Year 1 · Numbers to 100 · Summary
Year 1 Numbers to 100: summary and key words
Part of the Year 1 numbers to 100 chapter. Chapter overview · whole chapter on one page
Chapter summary
| Skill | Method |
|---|---|
| Count to 100 | Count on to go forwards, count back to go backwards. The 100 square shows the order. |
| Count in tens | Each ten is 10 more than the one before. Change the tens, not the ones. |
| Tens and ones | The tens go on the left and the ones go on the right. 47 is 4 tens and 7 ones. |
| One more and one less | One more is the next number. One less is the number before. Watch the ends of rows. |
| Compare numbers | Look at the tens first. If the tens are the same, look at the ones. |
| Order numbers | Put numbers in order by their tens, then their ones. |
Can you…?
- I can count forwards and backwards to 100, from any number
- I can use the 100 square to count on and back
- I can count in tens, and say 10 more and 10 less
- I can say how many tens and ones a number has, and write it in numerals
- I can say one more and one less, even across a ten
- I can say which of two numbers to 100 is bigger, and put numbers in order
Key terms
- 100 square
- a grid with the numbers 1 to 100 in ten rows of ten
- ten
- a bundle of ten ones, or a number like 10, 20 or 30
- ones
- the single things, or the digit on the right of a number
- tens digit
- the digit on the left that tells us how many tens
- one more
- the next number
- one less
- the number just before
- compare
- to look at two numbers and say which is bigger or smaller
- in order
- going from smallest to biggest, or from biggest to smallest