// Numbas version: finer_feedback_settings
{"name": "Four Operations", "extensions": [], "custom_part_types": [], "resources": [], "navigation": {"allowregen": true, "showfrontpage": false, "preventleave": false, "typeendtoleave": false}, "question_groups": [{"pickingStrategy": "all-ordered", "questions": [{"metadata": {"description": "<p>This is a set of questions designed to help you praction adding, subtracting, multiplying and dividing fractions.</p>\n<p>All of these can be done without a calculator</p>", "licence": "Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International"}, "name": "Four Operations", "showQuestionGroupNames": false, "preamble": {"css": "", "js": ""}, "statement": "<p>These are basic questions to help you practice adding, subtracting, multiplying and dividing fractions.</p>\n<p>You should be able to do these without a calculator.</p>\n<p>You can show steps to help you with the methods. &nbsp;You will lose marks for continuously veiwing steps.</p>\n<p>Use &nbsp;/ to signify a fraction or division, for example $\\frac{3}{4}$&nbsp;is written 2/3.</p>", "functions": {}, "rulesets": {}, "tags": [], "ungrouped_variables": ["a", "b", "c", "d", "f", "g", "j", "m", "p", "r", "t", "v", "x", "z", "bb", "dd", "ff", "hh", "jj", "ll", "nn", "pp", "rr", "tt", "h", "k", "l", "n", "o", "q", "s", "u", "w", "y", "aa", "cc", "ee", "gg", "ii", "kk", "mm", "oo", "qq", "ss"], "variablesTest": {"maxRuns": 100, "condition": ""}, "question_groups": [{"name": "", "pickingStrategy": "all-ordered", "questions": [], "pickQuestions": 0}], "variables": {"qq": {"name": "qq", "group": "Ungrouped variables", "templateType": "anything", "definition": "random(1..rr-1) //random numerator less than denominator", "description": ""}, "rr": {"name": "rr", "group": "Ungrouped variables", "templateType": "anything", "definition": "random(2..20) //random denominator", "description": ""}, "nn": {"name": "nn", "group": "Ungrouped variables", "templateType": "anything", "definition": "random(2..20) //random denominator", "description": ""}, "d": {"name": "d", "group": "Ungrouped variables", "templateType": "anything", "definition": "random(1..f-1) //random numerator less than denominator", "description": ""}, "jj": {"name": "jj", "group": "Ungrouped variables", "templateType": "anything", "definition": "random(2..20) //random denominator", "description": ""}, "ll": {"name": "ll", "group": "Ungrouped variables", "templateType": "anything", "definition": "random(2..20) //random denominator", "description": ""}, "f": {"name": "f", "group": "Ungrouped variables", "templateType": "anything", "definition": "random(2..20) //random denominator", "description": ""}, "b": {"name": "b", "group": "Ungrouped variables", "templateType": "anything", "definition": "random(2..20) //random denominator", "description": ""}, "k": {"name": "k", "group": "Ungrouped variables", "templateType": "anything", "definition": "random(1..j-h) //random numerator less than denominator", "description": ""}, "v": {"name": "v", "group": "Ungrouped variables", "templateType": "anything", "definition": "random(2..20) //random denominator", "description": ""}, "aa": {"name": "aa", "group": "Ungrouped variables", "templateType": "anything", "definition": "random(1..bb-1) //random numerator less than denominator", "description": ""}, "j": {"name": "j", "group": "Ungrouped variables", "templateType": "anything", "definition": "random(2..20) //random denominator", "description": ""}, "h": {"name": "h", "group": "Ungrouped variables", "templateType": "anything", "definition": "random(1..j-1) //random numerator less than denominator", "description": ""}, "hh": {"name": "hh", "group": "Ungrouped variables", "templateType": "anything", "definition": "random(2..20) //random denominator", "description": ""}, "l": {"name": "l", "group": "Ungrouped variables", "templateType": "anything", "definition": "random(1..m-1) //random numerator less than denominator", "description": ""}, "o": {"name": "o", "group": "Ungrouped variables", "templateType": "anything", "definition": "random(1..p-1) //random numerator less than denominator", "description": ""}, "r": {"name": "r", "group": "Ungrouped variables", "templateType": "anything", "definition": "random(2..20) //random denominator", "description": ""}, "ff": {"name": "ff", "group": "Ungrouped variables", "templateType": "anything", "definition": "random(2..20) //random denominator", "description": ""}, "ii": {"name": "ii", "group": "Ungrouped variables", "templateType": "anything", "definition": "random(1..jj-1) //random numerator less than denominator", "description": ""}, "n": {"name": "n", "group": "Ungrouped variables", "templateType": "anything", "definition": "random(1..m-l) //random numerator less than denominator", "description": ""}, "pp": {"name": "pp", "group": "Ungrouped variables", "templateType": "anything", "definition": "random(2..20) //random denominator", "description": ""}, "z": {"name": "z", "group": "Ungrouped variables", "templateType": "anything", "definition": "random(2..20) //random denominator", "description": ""}, "tt": {"name": "tt", "group": "Ungrouped variables", "templateType": "anything", "definition": "random(2..20) //random denominator", "description": ""}, "x": {"name": "x", "group": "Ungrouped variables", "templateType": "anything", "definition": "random(2..20) //random denominator", "description": ""}, "kk": {"name": "kk", "group": "Ungrouped variables", "templateType": "anything", "definition": "random(1..ll-1) //random numerator less than denominator", "description": ""}, "oo": {"name": "oo", "group": "Ungrouped variables", "templateType": "anything", "definition": "random(1..pp-1) //random numerator less than denominator", "description": ""}, "y": {"name": "y", "group": "Ungrouped variables", "templateType": "anything", "definition": "random(1..x-1) //random numerator less than denominator", "description": ""}, "bb": {"name": "bb", "group": "Ungrouped variables", "templateType": "anything", "definition": "random(2..20) //random denominator", "description": ""}, "p": {"name": "p", "group": "Ungrouped variables", "templateType": "anything", "definition": "random(2..20) //random denominator", "description": ""}, "c": {"name": "c", "group": "Ungrouped variables", "templateType": "anything", "definition": "random(1..b-a) //random numerator less than denominator", "description": ""}, "mm": {"name": "mm", "group": "Ungrouped variables", "templateType": "anything", "definition": "random(1..nn-1) //random numerator less than denominator", "description": ""}, "g": {"name": "g", "group": "Ungrouped variables", "templateType": "anything", "definition": "random(1..f-d) //random numerator less than denominator", "description": ""}, "a": {"name": "a", "group": "Ungrouped variables", "templateType": "anything", "definition": "random(1..b-1) //random numerator less than denominator", "description": ""}, "s": {"name": "s", "group": "Ungrouped variables", "templateType": "anything", "definition": "random(1..t-1) //random numerator less than denominator", "description": ""}, "m": {"name": "m", "group": "Ungrouped variables", "templateType": "anything", "definition": "random(2..20) //random denominator", "description": ""}, "cc": {"name": "cc", "group": "Ungrouped variables", "templateType": "anything", "definition": "random(1..dd-1) //random numerator less than denominator", "description": ""}, "u": {"name": "u", "group": "Ungrouped variables", "templateType": "anything", "definition": "random(1..v-1) //random numerator less than denominator", "description": ""}, "dd": {"name": "dd", "group": "Ungrouped variables", "templateType": "anything", "definition": "random(2..20) //random denominator", "description": ""}, "t": {"name": "t", "group": "Ungrouped variables", "templateType": "anything", "definition": "random(2..20) //random denominator", "description": ""}, "w": {"name": "w", "group": "Ungrouped variables", "templateType": "anything", "definition": "random(1..x-1) //random numerator less than denominator", "description": ""}, "q": {"name": "q", "group": "Ungrouped variables", "templateType": "anything", "definition": "random(1..r-1) //random numerator less than denominator", "description": ""}, "ee": {"name": "ee", "group": "Ungrouped variables", "templateType": "anything", "definition": "random(1..ff-1) //random numerator less than denominator", "description": ""}, "gg": {"name": "gg", "group": "Ungrouped variables", "templateType": "anything", "definition": "random(1..hh-1) //random numerator less than denominator", "description": ""}, "ss": {"name": "ss", "group": "Ungrouped variables", "templateType": "anything", "definition": "random(1..tt-1) //random numerator less than denominator", "description": ""}}, "advice": "", "type": "question", "parts": [{"maxValue": "(a*c)/(b*b)", "variableReplacements": [], "variableReplacementStrategy": "originalfirst", "showPrecisionHint": false, "marks": "3", "correctAnswerFraction": true, "scripts": {}, "minValue": "(a*c)/(b*b)", "prompt": "<p>What is the answer to $\\frac{\\var{a}}{\\var{b}} \\times \\frac{\\var{c}}{\\var{b}}$?</p>", "stepsPenalty": 0, "steps": [{"maxValue": "a*c", "variableReplacements": [], "showPrecisionHint": false, "marks": 1, "correctAnswerFraction": false, "scripts": {}, "minValue": "a*c", "prompt": "<p>Multiply the numerators</p>", "variableReplacementStrategy": "originalfirst", "showCorrectAnswer": true, "type": "numberentry", "allowFractions": false}, {"maxValue": "b*b", "variableReplacements": [], "showPrecisionHint": false, "marks": 1, "correctAnswerFraction": false, "scripts": {}, "minValue": "b*b", "prompt": "<p>Multiply the denominators</p>", "variableReplacementStrategy": "originalfirst", "showCorrectAnswer": true, "type": "numberentry", "allowFractions": false}, {"maxValue": "(a*c)/(b*b)", "variableReplacements": [], "showPrecisionHint": false, "marks": 1, "correctAnswerFraction": true, "scripts": {}, "minValue": "(a*c)/(b*b)", "prompt": "<p>Put into a fration</p>", "variableReplacementStrategy": "originalfirst", "showCorrectAnswer": true, "type": "numberentry", "allowFractions": true}], "showCorrectAnswer": true, "type": "numberentry", "allowFractions": true}, {"maxValue": "d/g", "variableReplacements": [], "variableReplacementStrategy": "originalfirst", "showPrecisionHint": false, "marks": "3", "correctAnswerFraction": true, "scripts": {}, "minValue": "d/g", "prompt": "<p>What is the answer to $\\frac{\\var{d}}{\\var{f}} \\div \\frac{\\var{g}}{\\var{f}}$?</p>", "stepsPenalty": 0, "steps": [{"maxValue": "f/g", "variableReplacements": [], "showPrecisionHint": false, "marks": 1, "correctAnswerFraction": true, "scripts": {}, "minValue": "f/g", "prompt": "<p>Filp the second fraction</p>", "variableReplacementStrategy": "originalfirst", "showCorrectAnswer": true, "type": "numberentry", "allowFractions": true}, {"maxValue": "(d*f)/(g*f)", "variableReplacements": [], "showPrecisionHint": false, "marks": 1, "correctAnswerFraction": true, "scripts": {}, "minValue": "(d*f)/(g*f)", "prompt": "<p>Multiply the fractions as above</p>", "variableReplacementStrategy": "originalfirst", "showCorrectAnswer": true, "type": "numberentry", "allowFractions": true}], "showCorrectAnswer": true, "type": "numberentry", "allowFractions": true}, {"maxValue": "(h+k)/j", "variableReplacements": [], "variableReplacementStrategy": "originalfirst", "showPrecisionHint": false, "marks": "3", "correctAnswerFraction": true, "scripts": {}, "minValue": "(h+k)/j", "prompt": "<p>What is the answer to $\\frac{\\var{h}}{\\var{j}} + \\frac{\\var{k}}{\\var{j}}$?</p>", "stepsPenalty": 0, "steps": [{"prompt": "<p>Check to see if the denominators are the same</p>", "variableReplacements": [], "showCorrectAnswer": true, "marks": 0, "type": "information", "variableReplacementStrategy": "originalfirst", "scripts": {}}, {"maxValue": "h+k", "variableReplacements": [], "showPrecisionHint": false, "marks": 1, "correctAnswerFraction": true, "scripts": {}, "minValue": "h+k", "prompt": "<p>Add the numerators</p>", "variableReplacementStrategy": "originalfirst", "showCorrectAnswer": true, "type": "numberentry", "allowFractions": true}, {"maxValue": "(h+k)/j", "variableReplacements": [], "showPrecisionHint": false, "marks": 1, "correctAnswerFraction": false, "scripts": {}, "minValue": "(h+k)/j", "prompt": "<p>Write as a fraction over the similar denominator; cancel down if you can.</p>", "variableReplacementStrategy": "originalfirst", "showCorrectAnswer": true, "type": "numberentry", "allowFractions": false}], "showCorrectAnswer": true, "type": "numberentry", "allowFractions": true}, {"maxValue": "(l-n)/m", "variableReplacements": [], "variableReplacementStrategy": "originalfirst", "showPrecisionHint": false, "marks": "3", "correctAnswerFraction": true, "scripts": {}, "minValue": "(l-n)/m", "prompt": "<p>What is the answer to $\\frac{\\var{l}}{\\var{m}} - \\frac{\\var{n}}{\\var{m}}$?</p>", "stepsPenalty": 0, "steps": [{"prompt": "<p>Check to see if the denominators are the same</p>", "variableReplacements": [], "showCorrectAnswer": true, "marks": 0, "type": "information", "variableReplacementStrategy": "originalfirst", "scripts": {}}, {"maxValue": "abs((l-n))", "variableReplacements": [], "showPrecisionHint": false, "marks": 1, "correctAnswerFraction": false, "scripts": {}, "minValue": "abs((l-n))", "prompt": "<p>Subtract the numerators</p>", "variableReplacementStrategy": "originalfirst", "showCorrectAnswer": true, "type": "numberentry", "allowFractions": false}, {"maxValue": "(abs((l-n)))/m", "variableReplacements": [], "showPrecisionHint": false, "marks": 1, "correctAnswerFraction": false, "scripts": {}, "minValue": "(abs((l-n)))/m", "prompt": "<p>Create a fraction with the original denominator; cancel down if you can.</p>", "variableReplacementStrategy": "originalfirst", "showCorrectAnswer": true, "type": "numberentry", "allowFractions": false}], "showCorrectAnswer": true, "type": "numberentry", "allowFractions": true}, {"maxValue": "(o*q)/(p*r)", "variableReplacements": [], "variableReplacementStrategy": "originalfirst", "showPrecisionHint": false, "marks": "3", "correctAnswerFraction": true, "scripts": {}, "minValue": "(o*q)/(p*r)", "prompt": "<p>What is the answer to $\\frac{\\var{o}}{\\var{p}} \\times \\frac{\\var{q}}{\\var{r}}$?</p>", "stepsPenalty": "1", "steps": [{"prompt": "<p>Multiply the numerators to make the top of the fraction</p>\n<p>Multiply the denominators to make the bottom of the fraction</p>\n<p>Cancel down if you can</p>", "variableReplacements": [], "showCorrectAnswer": true, "marks": 0, "type": "information", "variableReplacementStrategy": "originalfirst", "scripts": {}}], "showCorrectAnswer": true, "type": "numberentry", "allowFractions": true}, {"maxValue": "(s*v)/(u*t)", "variableReplacements": [], "variableReplacementStrategy": "originalfirst", "showPrecisionHint": false, "marks": "3", "correctAnswerFraction": true, "scripts": {}, "minValue": "(s*v)/(u*t)", "prompt": "<p>What is the answer to $\\frac{\\var{s}}{\\var{t}} \\div \\frac{\\var{u}}{\\var{v}}$?</p>", "stepsPenalty": "1", "steps": [{"prompt": "<p>Flip the second fraction</p>\n<p>Multiply through as before</p>", "variableReplacements": [], "showCorrectAnswer": true, "marks": 0, "type": "information", "variableReplacementStrategy": "originalfirst", "scripts": {}}], "showCorrectAnswer": true, "type": "numberentry", "allowFractions": true}, {"maxValue": "((w*z)+(y*x))/(x*z)", "variableReplacements": [], "variableReplacementStrategy": "originalfirst", "showPrecisionHint": false, "marks": "3", "correctAnswerFraction": true, "scripts": {}, "minValue": "((w*z)+(y*x))/(x*z)", "prompt": "<p>What is the answer to $\\frac{\\var{w}}{\\var{x}} + \\frac{\\var{y}}{\\var{z}}$?</p>", "stepsPenalty": "1", "steps": [{"prompt": "<p>Check to see if the denominators are the same</p>\n<p>If they are not - multiply each fraction up to equivalent fractions with equal denominators</p>\n<p>Once they are equal add the numerators and put over the equal denominator</p>\n<p>Cancel down if needed</p>", "variableReplacements": [], "showCorrectAnswer": true, "marks": 0, "type": "information", "variableReplacementStrategy": "originalfirst", "scripts": {}}], "showCorrectAnswer": true, "type": "numberentry", "allowFractions": true}, {"maxValue": "((aa*dd)-(cc*bb))/(bb*dd)", "variableReplacements": [], "variableReplacementStrategy": "originalfirst", "showPrecisionHint": false, "marks": "3", "correctAnswerFraction": true, "scripts": {}, "minValue": "((aa*dd)-(cc*bb))/(bb*dd)", "prompt": "<p>What is the answer to $\\frac{\\var{aa}}{\\var{bb}} - \\frac{\\var{cc}}{\\var{dd}}$?</p>", "stepsPenalty": "1", "steps": [{"prompt": "<p>Check to see if the denominators are the same</p>\n<p>If they are not - multiply each fraction up to equivalent fractions with equal denominators</p>\n<p>Once they are equal subtract&nbsp;the numerators and put over the equal denominator</p>\n<p>Cancel down if needed</p>", "variableReplacements": [], "showCorrectAnswer": true, "marks": 0, "type": "information", "variableReplacementStrategy": "originalfirst", "scripts": {}}], "showCorrectAnswer": true, "type": "numberentry", "allowFractions": true}, {"maxValue": "(ee*gg)/(ff*hh)", "variableReplacements": [], "variableReplacementStrategy": "originalfirst", "showPrecisionHint": false, "marks": "3", "correctAnswerFraction": true, "scripts": {}, "minValue": "(ee*gg)/(ff*hh)", "prompt": "<p>What is the answer to $\\frac{\\var{ee}}{\\var{ff}} \\times&nbsp;\\frac{\\var{gg}}{\\var{hh}}$?</p>", "stepsPenalty": "3", "steps": [{"prompt": "<p>Follow through the steps from the first and fifth questions</p>", "variableReplacements": [], "showCorrectAnswer": true, "marks": 0, "type": "information", "variableReplacementStrategy": "originalfirst", "scripts": {}}], "showCorrectAnswer": true, "type": "numberentry", "allowFractions": true}, {"maxValue": "(ii*ll)/(jj*kk)", "variableReplacements": [], "variableReplacementStrategy": "originalfirst", "showPrecisionHint": false, "marks": "3", "correctAnswerFraction": true, "scripts": {}, "minValue": "(ii*ll)/(jj*kk)", "prompt": "<p>What is the answer to $\\frac{\\var{ii}}{\\var{jj}} \\div \\frac{\\var{kk}}{\\var{ll}}$?</p>", "stepsPenalty": "3", "steps": [{"prompt": "<p>Follow the steps from the second and sixth questions</p>", "variableReplacements": [], "showCorrectAnswer": true, "marks": 0, "type": "information", "variableReplacementStrategy": "originalfirst", "scripts": {}}], "showCorrectAnswer": true, "type": "numberentry", "allowFractions": true}, {"maxValue": "((mm*pp)+(nn*oo))/(nn*pp)", "variableReplacements": [], "variableReplacementStrategy": "originalfirst", "showPrecisionHint": false, "marks": "3", "correctAnswerFraction": true, "scripts": {}, "minValue": "((mm*pp)+(nn*oo))/(nn*pp)", "prompt": "<p>What is the answer to $\\frac{\\var{mm}}{\\var{nn}} + \\frac{\\var{oo}}{\\var{pp}}$?</p>", "stepsPenalty": "3", "steps": [{"prompt": "<p>Follow the steps from the third &nbsp;and seventh questions</p>", "variableReplacements": [], "showCorrectAnswer": true, "marks": 0, "type": "information", "variableReplacementStrategy": "originalfirst", "scripts": {}}], "showCorrectAnswer": true, "type": "numberentry", "allowFractions": true}, {"maxValue": "((qq*tt)-(rr*ss))/(rr*tt)", "variableReplacements": [], "variableReplacementStrategy": "originalfirst", "showPrecisionHint": false, "marks": "3", "correctAnswerFraction": true, "scripts": {}, "minValue": "((qq*tt)-(rr*ss))/(rr*tt)", "prompt": "<p>What is the answer to $\\frac{\\var{qq}}{\\var{rr}} - \\frac{\\var{ss}}{\\var{tt}}$?</p>", "stepsPenalty": "3", "steps": [{"prompt": "<p>Follow the steps from the fourth and eighth questions</p>", "variableReplacements": [], "showCorrectAnswer": true, "marks": 0, "type": "information", "variableReplacementStrategy": "originalfirst", "scripts": {}}], "showCorrectAnswer": true, "type": "numberentry", "allowFractions": true}], "extensions": [], "variable_groups": [], "contributors": [{"name": "steve kilgallon", "profile_url": "https://numbas.mathcentre.ac.uk/accounts/profile/268/"}]}]}], "contributors": [{"name": "steve kilgallon", "profile_url": "https://numbas.mathcentre.ac.uk/accounts/profile/268/"}]}