Grade 1 · Unit 1: Number and place value

Odd and even

Can every number make pairs?

Everybody find a partner!

Our teacher says: “Find a partner!” If everyone has a partner, the class is an even number. If one child is left without a partner, the number is odd.

Even numbers make pairs

Put the socks in pairs. 8 socks make 4 pairs. None are left over. So 8 is an even number.

Odd numbers have one left

Now try 7 counters. We make 3 pairs, and 1 counter is left alone. So 7 is an odd number.

Look at the last digit

Even numbers end in 0, 2, 4, 6 or 8. Odd numbers end in 1, 3, 5, 7 or 9. Is 46 odd or even? It ends in 6, so it is even!

What I learnt

• I can tell if a number is odd or even by making pairs.
• I know even numbers end in 0, 2, 4, 6 or 8.