VC2M6N04 Official strand: Number

Add and subtract decimal quantities

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Use place value, estimate and check decimal calculations.

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Calculate 1.42 + 0.38. Give a decimal answer.

A18 B1.8 C0.18 D1.9

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Answer: 1.8

Align the decimal points so equal place values meet.
1.42 + 0.38 = 1.8.

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Curriculum reference

Victorian Curriculum F–10 Version 2.0

Pi Leo practice scope

Use place value, estimate and check decimal calculations.

Read the official VCAA curriculum description (VC2M6N04)

These quizzes practise concepts within this topic. Multiple-choice answers alone do not demonstrate drawing, conducting an investigation or using a digital tool.

Activities to practise beyond the quiz

Supported by the guided activity; selecting an MCQ does not demonstrate this action.

VC2M6N04-C01Add units to units, tenths to tenths and hundredths to hundredths. Trailing zeroes help align numbers without changing their values.
VC2M6N04-C02Subtraction uses the same place-value structure as whole numbers. Regroup one unit as ten tenths when required.
VC2M6N04-C03Round the starting quantities to useful values and compare the approximate result with the exact calculation.
VC2M6N04-C04Choosing digital tools and explaining an estimation check.

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Subskills

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Descriptor-derived subskills

D01
Align like placesAdd units to units, tenths to tenths and hundredths to hundredths. Trailing zeroes help align numbers without changing their values.
D02
Regroup decimal placesSubtraction uses the same place-value structure as whole numbers. Regroup one unit as ten tenths when required.
D03
Check the size of the answerRound the starting quantities to useful values and compare the approximate result with the exact calculation.