Rounding to the nearest tenth

Purpose:

The purpose of this activity is to help your child to learn to round to the nearest tenth.

Link to the Number Framework:

Place value, Stage 7

What you need:

  • Supermarket receipt
  • Pen and paper
  • Calculator

What to do:

  • Give your child a supermarket shopping receipt and look at the prices together.
  • Ask them to round the prices to the nearest ten cent.
  • Remember that it is a mathematical convention to round 5 up to 10 although some supermarkets round 5 down to the nearest ten. (For example, Pak'n Save, New World and Four Square)
  • Write down the prices rounded to the nearest ten cents.
  • Ask your child to add up the rounded prices using a calculator. See how close it is to the actual cost.

What to expect your child to do:

  • To round numbers to the nearest tenth.

Variation:

  • Round other decimals to the nearest tenth. For example, measure lengths (in metres and centimeters) and round to the nearest 10 centimeters.

He Kupu Māori:

dollar tāra
cent hēneti
round (a number) whakaawhiwhi (-a)
rounded price utu whakaawhiwhi
receipt rīhiti
supermarket hokomaha

Download a file of this activity:

PDF (91KB) or Word (31KB)

Download a file of this activity including questions to ask in Māori:

PDF (102KB) or Word (34KB)

Download a Pasifika version of this activity:

PDF (79KB) or Word (497KB)