Odd and even numbers · Grade 2

In Grade 2 you learn: odd and even numbers to 20; odd and even numbers to 100; odd and even numbers in bigger numbers.

Even numbers can be shared into pairs (or two equal groups) with nothing left over. Odd numbers always have one left over. You can tell straight away from the last digit, which makes odd and even a quick check on lots of calculations.

Key facts

• Even numbers end in 0, 2, 4, 6 or 8. Odd numbers end in 1, 3, 5, 7 or 9.
• Only the ones digit matters: 3,458 is even because 8 is even.
• even + even = even; odd + odd = even; odd + even = odd.
• even × anything = even; odd × odd = odd.
• Counting in 2s from 0 gives the even numbers; from 1 gives the odd numbers.

Worked examples

Other years

• Odd and even numbers · Grade 1