First, add 2 + 3:

2 + 3 = 4 + ?

5 = 4 + ?

Decide which number makes the addition number sentence true. You can think of an addition fact you know, or you can subtract to find the answer.

The addition fact is:

4 + 1 = 5

Did you remember this addition fact? If not, you can find the answer by subtracting.

Subtract:

5 − 4 = 1

The missing number is 1.

First, add 8 + 3 :

8 + 3 = ? + 4

11 = ? + 4

Decide which number makes the addition number sentence true. You can think of an addition fact you know, or you can subtract to find the answer.

The addition fact is :

7 + 4 = 11

Did you remember this addition fact? If not, you can find the answer by subtracting.

Subtract:

11 − 4 = 7

The missing number is 7.

First, add 3 + 2 :

3 + 2 = 1 + ?

5 = 1 + ?

Decide which number makes the addition number sentence true. You can think of an addition fact you know, or you can subtract to find the answer.

The addition fact is :

1 + 4 = 5

Did you remember this addition fact? If not, you can find the answer by subtracting.

Subtract :

5 − 1 = 4

The missing number is 4.