Unit 1 – Numbers and patterns
Counting patterns
Start counting in multiples of ten: 10, 20, 30 … What is the 15th number that you will say? What is the 50th number you will say? What about the 100th number? Explain how you know. Now start counting in tens from 40: 40, 50, 60 …
1 Look at the counting patterns for multiples of 25 and multiples of 50. 0 25 50 75 100 125 150 175 200 225 250
25
50
0
50
100
150
200
250
There are two 25s in every 50 so the numbers in the count of 50 can also be found in the count of 25. 25 50 75 100 125 150 175 200 225 250 275 300 … The ones digits in the count of 25 also make a pattern with the digits 5 and 0. This means that the count of 25 has a pattern with even and odd numbers.
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