Decades

Required materials

• magazines or "junk" mail – advertising leaflets for supermarkets and stores

See Materials that come with this resource to download:

• Decades activity (.pdf)

What to do

Help your child to cut out numbers in the range 1 – 100 from the newspaper or circulars.

Work together to sort the numbers into piles of the same decade: 10s, 20s, 30s, 40s, and 50s.

Skip counting the number of tens in the number (10, 20, 30, …).

For example, for 56, skip count 10, 20, 30, 40, 50, using your fingers to count the 5 tens.

When you have the numbers in piles, ask your child what is the same about the numbers. For example, all the 50s numbers start with 5 and have 5 tens in them.

Help your child to cut out a few more numbers and ask:

• How many tens are in this number?
• What pile does it belong in?

What to expect your child to do

• Firstly, skip count in tens, then recognise the digit in the tens place also tells them the number of tens in the number.

Variation

• As you come across other numbers up to 100, ask your child how many tens are in the number.
• Use other languages to count in 10s.

He kupu Māori

He whakawhitinga kōrero

• Kimihia ngā tau mai i te 0 ki te 100, ka tapahia ai. (Look for numbers from 0 to 100 and cut them out.)
• Tatauria ngā tekau kei roto i tēnā tau. (Count the tens in that number.)
• E hia ngā tekau kei roto i tēnā tau? Tatauria. (How many tens are in that number? Count them.)
• Tatauria ngā tekau i ō matimati. (Count the tens on your fingers.)
• Whakaputua ngā rima tekau ki konā, ngā ono tekau ki konā ... (Make a pile of the 50’s there, the 60’s there ...)

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