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8+=17 9+=16 9 +=18
17-8= 16-9= 18-9=
17-=8 16-=9 18-=9
16-8= 19-9= 16-6=
17-9= 16 –9= 17-8=
16-7= 18-8= 18-9=
①8+=15 ②9+=14 ③+9 =15
④15– 8= ⑤14–9 = ⑥15 – 9 =
⑦15–7= ⑧14–5 = ⑨15-6 =
进入组卷
