2
The odd and even pattern
Learner’s Book 1: Unit 1, p. 33
GoalFind the pattern of odd and even numbers on the number track and use it to say if a number to 10 is odd or even.
New words
pattern · something that repeats in a way we can seeeven · can be put into pairs with none left overodd · has 1 left over when put into pairs
Explanation
Look at the number track. The even numbers are 2, 4, 6, 8 and 10. The odd numbers are 1, 3, 5, 7 and 9. In the picture the even numbers are blue and the odd numbers are orange. The colours go orange, blue, orange, blue all the way along. That is a pattern. The numbers go odd, even, odd, even. When you know the pattern, you do not always need counters to find out.
Worked examples
The even numbers on the track are 2, 4, 6, 8 and 10.
The odd numbers on the track are 1, 3, 5, 7 and 9.
Is 7 odd or even? Look at the pattern: 5 is odd, 6 is even, 7 is odd again. So 7 is odd.
Class activity
Hop the track: draw a number track from 1 to 10 on the ground with chalk, or lay out 10 sheets of paper. Hop along it saying the numbers, and clap only on the even numbers. Then go back and clap only on the odd numbers. What pattern do your claps make?
Practice
1
Use the number track. Is 6 odd or even?
Even.
2
Put the bugs into pairs. Is 5 odd or even?
Odd. There are 2 pairs and 1 left over.
3
Write all the even numbers on the track from 1 to 10.
2, 4, 6, 8, 10
4
5 is odd. Is the next number, 6, odd or even?
Even. The pattern goes odd, even, odd, even.