Numbers to 100 · Usually met around P1
Skip counting in 2s, 3s, 5s and 10s
2, 3, 5 or 10 more each time.
How to do it
Method
2, 3, 5 or 10 more each time
3, 6, 9, 12; 5, 10, 15, 20; 3, 13, 23, 33
Another way
Jumps on a number line
0 → 5 → 10 → 15
In full
Counting in twos is 2 more each time: 2, 4, 6, 8; start from an odd number and they all stay odd: 3, 5, 7. Counting in threes is 3 more each time: 3, 6, 9, 12, 15, 18, odd and even taking turns. Counting in fives is 5 more each time, and from 0 or 5 the ones digit is always 5 or 0: 5, 10, 15, 20. Counting in tens is 10 more each time: the tens go up 1 and the ones stay: 3, 13, 23, 33. With a lot of things, count them in twos, fives or tens: quicker, and nothing missed. Or jump 2, 3, 5 or 10 steps at a time on a number line.
Worked examples
Have a go first, then open each one for the answer and the working.
Example 1
Count in fives: 15, 20, 25, □
Show the answer and working
Answer: 30
5 more each time, ending in 5 or 0: 25 + 5 = 30.
Example 2
Count back in tens: 71, □, □, 41
Fill in each box
Show the answer and working
Answer: 61，51
10 less each time: the tens go down 1 and the ones stay: 71, 61, 51, 41.
Example 3
Counting in threes from 0, which of these numbers will you say?
- A. 35
- B. 82
- C. 22
- D. 90
Choose the right answer
Show the answer and working
Answer: D. 90
From 0, 3 more each time: 30 counts reach 90, so you say 90.
Practise it in the game →Numbers to 100 · Free to start, unlimited questions, no download