18以內加減心算練習6

4 + ___ = 8

3 + ___ = 4

___ + 6 = 7

___ + 3 = 9

4 + ___ = 6

3 + ___ = 5

5 + ___ = 10

___ + 2 = 8

___ + 2 = 7

3 + ___ = 6