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Mathematics / Year 5 / Number and Algebra / Number and place value

View on Australian Curriculum website Australian Curriculum, Assessment and Reporting Authority
Curriculum content descriptions

Use estimation and rounding to check the reasonableness of answers to calculations (ACMNA099)

Elaborations
  • recognising the usefulness of estimation to check calculations
  • applying mental strategies to estimate the result of calculations, such as estimating the cost of a supermarket trolley load
General capabilities
  • Numeracy Numeracy
ScOT terms

Rounding,  Accuracy and precision

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4 direct matches to ACMNA099 | 5 other related resources

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What are non-standard measurement units? Did you know we can reliably use objects in the real world, including our own body parts, to measure things? This concept of anthropometry, the ratios of body measurements, was first proposed by Leonardo da Vinci.

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It's an estimate, not a guess!

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An approximation is the nearest estimate without having the precise size or measurement of something. See how accurate estimates are made in logical ways using information about many things in our everyday lives.

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Interactive

Whole numbers level 5: four-digit numbers

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This set of online activities focuses on the development and consolidation of number concepts to four digits and beyond. This is the fifth of seven levels in a series focusing on whole numbers to six digits. This level develops ideas about place value, rounding and number notation. Each level includes interactive drills ...

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Interactive

Rounding decimals

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This is a six-page HTML resource about solving problems concerning rounding. It contains one video and eight questions, four of which are interactive. The resource discusses and explains solving problems with rounding of decimals to reinforce students' understanding.

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Rounding decimals to the nearest tenth

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This is a digital resource comprising a video demonstration of rounding a decimal fraction to the nearest tenth. The commentary uses and interchanges between the language of decimal places and decimal place values expressed in terms of tenths and hundredths. Practice questions dealing more broadly with rounding numbers ...

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Video

Rounding whole numbers: 2

  • TLF-IDM011490

This is a video demonstration of rounding a whole number to the nearest thousand. In the commentary, the presenter explains the thinking behind the process of rounding such numbers and presents a visual representation of rounding whole numbers using a number line. Practice questions with answers are included, and hints ...

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Interactive

Number patterns

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This is a five-page HTML resource about solving problems with number patterns. It contains two videos and six questions, one of which is interactive. The resource discusses and explains solving problems with number patterns to reinforce students' understanding.

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