When things are grouped in twos, we can count them easily going up in 2s.
Count the candles.
2 | 4 | 6 | 8 | 10 |
There are 10 candles here.
When things are grouped in tens, we can count them easily going up in 10s.
Count the candles.
10 | 20 | 30 | 40 | 50 |
There are 50 candles here.
Shall we have a go at some counting?