1
7 + 5 = □
3
□
10
2
12
2
想一想
7 + 4 = □
3
10
7 + 6 = □
10
1
11
3
3
13
7 + 7 = □
10
3
4
14
3
7 + 8 = □
7 + 8 = □
10
3
5
15
方法一
方法二
想 8 + 7 = 15
所以 7 + 8 = 15
7 + 9 = □
7 + 9 = □
10
3
6
16
想 9 + 7 = 16
所以 7 + 9 = 16
做一做
7 + 4 = 7 + 5 = 7 + 6 =
7 + 7 = 7 + 8 = 7 + 9 =
11
12
13
14
15
16
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