This question gives information for students on how to answer number entry parts, with some opportunities to try submitting answers.
", "licence": "Creative Commons Attribution 4.0 International"}, "statement": "", "advice": "", "rulesets": {}, "extensions": [], "builtin_constants": {"e": true, "pi,\u03c0": true, "i": true}, "constants": [], "variables": {"x": {"name": "x", "group": "Ungrouped variables", "definition": "random(100..1000#0)", "description": "", "templateType": "anything", "can_override": false}}, "variablesTest": {"condition": "", "maxRuns": 100}, "ungrouped_variables": ["x"], "variable_groups": [], "functions": {}, "preamble": {"js": "", "css": ""}, "parts": [{"type": "information", "useCustomName": true, "customName": "Notation", "marks": 0, "scripts": {}, "customMarkingAlgorithm": "", "extendBaseMarkingAlgorithm": true, "unitTests": [], "showCorrectAnswer": true, "showFeedbackIcon": true, "variableReplacements": [], "variableReplacementStrategy": "originalfirst", "nextParts": [], "suggestGoingBack": false, "adaptiveMarkingPenalty": 0, "exploreObjective": null, "prompt": "Numbers can be entered as integers, decimals or fractions.
\nEach question will tell you which kinds of numbers are acceptable in answers.
\nPut a dash before a number to make it negative. For example, -2.
| Number format | \nDefinition | \nExample | \n
|---|---|---|
| Integer | \nA sequence of digits | \n142 | \n
| Decimal | \nA sequence of digits, optionally followed by a . and more digits | \n53.321 | \n
| Fraction | \nTwo integers, separated by a / | \n22 / 7 | \n
Commas or spaces to separate powers of 1,000 are usually allowed.
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\nTry writing:
\n53 - an integer.3,000 - an integer with a comma after the thousands digit.-0.3213 - a decimal.600/11 - a fraction.Sometimes you are asked to round your answer to a certain number of decimal places or significant figures. Text near the input box will tell you how much precision to give.
\nIf you give an answer that is too precise, you may be penalised.
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\n[[0]]
\n[[1]]
\nTry submitting {dpformat(x,0)}.0 for the above part. Should it be marked as correct?
[[2]]
\n[[3]]
\nClick Try another question to get a different number to try.
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\nA number is in standard form when it is written in the form $a \\times 10^b$, where $a$ is a decimal number between $1$ and $10$, called the significand, and $b$ is an integer, called the exponent.
\nTo write a number in scientific notation in Numbas, use the letter e to separate the significand and exponent.
For example, $8.2 \\times 10^{-32}$ is written as 8.2e-32.
This part will mark any number written in scientific notation as correct.
\nTry:
\n1e05.32e1001.45e-30-3e+3Occasionally, the answer to a question is \"infinity\". While infinity is not a number, it's accepted as a valid answer to a number entry part.
\nFor positive infinity, write infinity.
For negative infinity, write -infinity.