7 5 12 5 7 12 12 7 5 12 5 7 8 7 15 7 8 15 15 8 7 15 7 8
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7 5 12
5 7 12
12
7 5
12
5 7
8 7 15
7 8 15
15 8 7
15 7 8
第二关：算减想加
3+8= 4+9= 5+7=
11—3= 13—4= 12—5=
11—8= 13―9= 12—7=
11
8
3
13
9
4
12
7
5
9 ＋ 8= 12 － 6= 14
－ 8=
11 － 6= 8 ＋ 7= 13
－ 6=
16 － 9= 15 － 6= 7
＋ 9=
15 － 7= 14 － 5= 6
＋ 6=
3 ＋ 8= 7 ＋ 7= 13
－ 7=
12 － 5= 14 － 6= 12
－ 9=
17
5
7
8
11
7
6
15
9
9
14
8
6
7
16
126
3
17 － 8 － 3= 9 ＋ 4 －
6=
11 － 6 ＋ 7= 5 ＋ 9 －
8=
5 ＋ 4 ＋ 6= 8 ＋ 7 －
9=
6
12
15
7
6
6
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