Counting by ones and tens

Front

Can counting by ones and tens work together?

Back

Yes, counting by ones and tens can work together to help us count larger numbers more easily.

Front

70 + 10 = ?

Back

80

Front

45 + 10 = ?

Back

55

Front

10 + 10 = ?

Back

20

Front

39 + 1 = ?

Back

40

Front

What is counting by ones?

Back

Counting by ones means adding one at a time, like 1, 2, 3, 4, and so on.

Front

What is counting by tens?

Back

Counting by tens means adding ten at a time, like 10, 20, 30, 40, and so on.

Front

How do you count from 1 to 10 by ones?

Back

1, 2, 3, 4, 5, 6, 7, 8, 9, 10.

Front

How do you count from 10 to 100 by tens?

Back

10, 20, 30, 40, 50, 60, 70, 80, 90, 100.

Front

What is the sum of 10 and 20?

Back

30