Counting in Decimals

The Ministry is migrating nzmaths content to Tāhurangi.           
Relevant and up-to-date teaching resources are being moved to Tāhūrangi (tahurangi.education.govt.nz). 
When all identified resources have been successfully moved, this website will close. We expect this to be in June 2024. 
e-ako maths, e-ako Pāngarau, and e-ako PLD 360 will continue to be available. 

For more information visit https://tahurangi.education.govt.nz/updates-to-nzmaths

Purpose:

You can help your child to count in decimal number sequences.

What you need:

Pen and paper

What to do:

Write a decimal number with 2 decimal places. For example 23.21

Name the decimal one tenth more than that number. Write the next five decimal numbers in order.

For example: 23.21    23.31    23.41    23.51    23.61    23.71

Ask your child to write a decimal number with 2 decimal places. For example 35.67

Take turns to name the decimal one hundredth more than that number. For example: 35.68

Have 3 or 4 turns each.

Ask your child to write another decimal number with 2 decimal places. For example: 45.32

Take turns to name the decimal one hundredth less than that number. For example 45.31

Have 3 or 4 turns each.

What to expect your child to do:

To be able to count forwards and backwards in decimal number sequences.

Variations:

Extend the activity by asking your child to write a decimal with 3 decimal places and count forwards and backwards in hundredths or thousandths.

He Kupu Māori:

tenths hautekau
hundredths haurau
decimal places mati ā-ira
decimal number tau ā-ira
thousandths haumano

He Whakawhitinga Kōrero:

  • Tuhia he tau kia rua ōna mati ā-ira. (Write a number with two decimal places.)
  • He aha te tau kotahi haurau te rahinga ake? (What is the number that is bigger by one hundredth?)
  • He aha te tau kotahi hautekau te itinga iho? (What is the number that is one tenth smaller?)
  • Tatauria whakamua ngā haurau. (Count forwards in hundredths.)
  • Tatauria whakamuri ngā haumano. (Count backwards in thousandths.)

Download a file of this activity:

PDF (253KB)