// Numbas version: finer_feedback_settings
{"name": "Basic arithmetic operations: addition and subtraction", "extensions": [], "custom_part_types": [], "resources": [["question-resources/drawingresize_grbP9s8.svg", "/srv/numbas/media/question-resources/drawingresize_grbP9s8.svg"]], "navigation": {"allowregen": true, "showfrontpage": false, "preventleave": false, "typeendtoleave": false}, "question_groups": [{"pickingStrategy": "all-ordered", "questions": [{"name": "Basic arithmetic operations: addition and subtraction", "type": "question", "statement": "<p>Calculate the following:</p>", "variablesTest": {"condition": "", "maxRuns": "100"}, "variables": {"pos": {"description": "<p>Random positive integers.</p>", "name": "pos", "group": "Ungrouped variables", "templateType": "anything", "definition": "repeat(random(1..300),5)"}, "neg": {"description": "<p>Random negative integers.</p>", "name": "neg", "group": "Ungrouped variables", "templateType": "anything", "definition": "repeat(random(-300..-1),8)"}, "dec": {"description": "<p>Random decimals.</p>", "name": "dec", "group": "Ungrouped variables", "templateType": "anything", "definition": "repeat(random(0..50 #0.01 except 0..50), 7)"}}, "extensions": [], "functions": {}, "tags": ["addition", "Addition", "Decimals", "decimals", "subtraction", "taxonomy"], "variable_groups": [], "parts": [{"scripts": {}, "variableReplacements": [], "type": "gapfill", "variableReplacementStrategy": "originalfirst", "showCorrectAnswer": true, "gaps": [{"correctAnswerFraction": false, "scripts": {}, "type": "numberentry", "variableReplacementStrategy": "originalfirst", "mustBeReducedPC": 0, "maxValue": "pos[0]+pos[1]+pos[2]", "showFeedbackIcon": true, "minValue": "pos[0]+pos[1]+pos[2]", "correctAnswerStyle": "plain", "allowFractions": false, "mustBeReduced": false, "notationStyles": ["plain", "en", "si-en"], "variableReplacements": [], "marks": "1", "showCorrectAnswer": true}], "showFeedbackIcon": true, "prompt": "<p style=\"padding-left: 30px;\">$\\var{pos[0]} + \\var{pos[1]} + \\var{pos[2]}=$ [[0]]</p>", "marks": 0}, {"scripts": {}, "variableReplacements": [], "type": "gapfill", "variableReplacementStrategy": "originalfirst", "showCorrectAnswer": true, "gaps": [{"correctAnswerFraction": false, "scripts": {}, "type": "numberentry", "variableReplacementStrategy": "originalfirst", "mustBeReducedPC": 0, "maxValue": "pos[3]+neg[0]", "showFeedbackIcon": true, "minValue": "pos[3]+neg[0]", "correctAnswerStyle": "plain", "allowFractions": false, "mustBeReduced": false, "notationStyles": ["plain", "en", "si-en"], "variableReplacements": [], "marks": "1", "showCorrectAnswer": true}], "showFeedbackIcon": true, "prompt": "<p style=\"padding-left: 30px;\">$\\var{pos[3]}&nbsp;+(\\var{neg[0]})=$ [[0]]</p>", "marks": 0}, {"scripts": {}, "variableReplacements": [], "type": "gapfill", "variableReplacementStrategy": "originalfirst", "showCorrectAnswer": true, "gaps": [{"correctAnswerFraction": false, "scripts": {}, "type": "numberentry", "variableReplacementStrategy": "originalfirst", "mustBeReducedPC": 0, "maxValue": "dec[0] - dec[1]", "showFeedbackIcon": true, "minValue": "dec[0] - dec[1]", "correctAnswerStyle": "plain", "allowFractions": false, "mustBeReduced": false, "notationStyles": ["plain", "en", "si-en"], "variableReplacements": [], "marks": "1", "showCorrectAnswer": true}], "showFeedbackIcon": true, "prompt": "<p style=\"padding-left: 30px;\">$\\var{dec[0]}&nbsp;- \\var{dec[1]}=$&nbsp;[[0]]</p>", "marks": 0}, {"scripts": {}, "variableReplacements": [], "type": "gapfill", "variableReplacementStrategy": "originalfirst", "showCorrectAnswer": true, "gaps": [{"correctAnswerFraction": false, "scripts": {}, "type": "numberentry", "variableReplacementStrategy": "originalfirst", "mustBeReducedPC": 0, "maxValue": "neg[1]-neg[2]", "showFeedbackIcon": true, "minValue": "neg[1]-neg[2]", "correctAnswerStyle": "plain", "allowFractions": false, "mustBeReduced": false, "notationStyles": ["plain", "en", "si-en"], "variableReplacements": [], "marks": "1", "showCorrectAnswer": true}], "showFeedbackIcon": true, "prompt": "<p style=\"padding-left: 30px;\">$\\var{neg[1]}&nbsp;- (\\var{neg[2]})=$ [[0]]</p>", "marks": 0}, {"scripts": {}, "variableReplacements": [], "type": "gapfill", "variableReplacementStrategy": "originalfirst", "showCorrectAnswer": true, "gaps": [{"correctAnswerFraction": false, "scripts": {}, "type": "numberentry", "variableReplacementStrategy": "originalfirst", "mustBeReducedPC": 0, "maxValue": "neg[3]+dec[2]", "showFeedbackIcon": true, "minValue": "neg[3]+dec[2]", "correctAnswerStyle": "plain", "allowFractions": false, "mustBeReduced": false, "notationStyles": ["plain", "en", "si-en"], "variableReplacements": [], "marks": "1", "showCorrectAnswer": true}], "showFeedbackIcon": true, "prompt": "<p style=\"padding-left: 30px;\">$\\var{neg[3]}&nbsp;+ \\var{dec[2]}=$&nbsp;[[0]]</p>", "marks": 0}], "ungrouped_variables": ["dec", "neg", "pos"], "rulesets": {}, "metadata": {"licence": "Creative Commons Attribution 4.0 International", "description": "<p>Addition and subtraction of integers and decimals.</p>"}, "preamble": {"css": "", "js": ""}, "advice": "<p>A sign between numbers usually tells us whether to<strong>&nbsp;add</strong> or&nbsp;<strong>subtract</strong>. Sometimes, we can see two signs following each other.</p>\n<p>We&nbsp;need to remember that <strong>two different signs</strong> (+ and - in any order) become a&nbsp;<strong>minus (-)</strong>, while <strong>two same signs</strong> become a <strong>plus (+)</strong>.</p>\n<table border=\"1\">\n<tbody>\n<tr>\n<th style=\"background-color: #d6d6d6;\">Operation</th>\n<th style=\"background-color: #d6d6d6;\">First sign</th>\n<th style=\"background-color: #d6d6d6;\">Second sign</th>\n<th style=\"background-color: #d6d6d6;\">Resulting sign</th>\n<th style=\"background-color: #d6d6d6;\">Resulting operation</th>\n<th style=\"background-color: #d6d6d6;\">Example</th>\n</tr>\n<tr>\n<td style=\"text-align: center; vertical-align: middle;\">Addition</td>\n<td style=\"text-align: center; vertical-align: middle;\">$+$</td>\n<td style=\"text-align: center; vertical-align: middle;\">$+$</td>\n<td style=\"text-align: center; vertical-align: middle;\">$+$</td>\n<td style=\"text-align: center; vertical-align: middle;\">Addition</td>\n<td>$3&nbsp;+ (+2) =&nbsp;3 + 2 =&nbsp;5$</td>\n</tr>\n<tr>\n<td style=\"text-align: center; vertical-align: middle;\">Addition</td>\n<td style=\"text-align: center; vertical-align: middle;\">$+$</td>\n<td style=\"text-align: center; vertical-align: middle;\">$-$</td>\n<td style=\"text-align: center; vertical-align: middle;\">$-$</td>\n<td style=\"text-align: center; vertical-align: middle;\">Subtraction</td>\n<td>$3&nbsp;+ (-2) =&nbsp;3 - 2 = 1$</td>\n</tr>\n<tr>\n<td style=\"text-align: center; vertical-align: middle;\">Subtraction</td>\n<td style=\"text-align: center; vertical-align: middle;\">$-$</td>\n<td style=\"text-align: center; vertical-align: middle;\">$+$</td>\n<td style=\"text-align: center; vertical-align: middle;\">$-$</td>\n<td style=\"text-align: center; vertical-align: middle;\">Subtraction</td>\n<td>$3&nbsp;- (+2) =&nbsp;3 - 2 = 1$</td>\n</tr>\n<tr>\n<td style=\"text-align: center; vertical-align: middle;\">Subtraction</td>\n<td style=\"text-align: center; vertical-align: middle;\">$-$</td>\n<td style=\"text-align: center; vertical-align: middle;\">$-$</td>\n<td style=\"text-align: center; vertical-align: middle;\">$+$</td>\n<td style=\"text-align: center; vertical-align: middle;\">Addition</td>\n<td>$3&nbsp;- (-2) =&nbsp;3&nbsp;+ 2 = 5$</td>\n</tr>\n</tbody>\n</table>\n<p>Another important thing to remember is to <strong>press AC</strong>&nbsp;on your calculator to clear it before you start&nbsp;the&nbsp;next&nbsp;calculation. If the following calculation starts with a minus, your calculator will assume you want to subtract something from your previous calculation, rather than start a new one.</p>", "contributors": [{"name": "Christian Lawson-Perfect", "profile_url": "https://numbas.mathcentre.ac.uk/accounts/profile/7/"}, {"name": "Stanislav Duris", "profile_url": "https://numbas.mathcentre.ac.uk/accounts/profile/1590/"}]}]}], "contributors": [{"name": "Christian Lawson-Perfect", "profile_url": "https://numbas.mathcentre.ac.uk/accounts/profile/7/"}, {"name": "Stanislav Duris", "profile_url": "https://numbas.mathcentre.ac.uk/accounts/profile/1590/"}]}