问题 口算题
我会直接写出得数。                                                                                                                 
16-9=11+3= 7+2+8=
6+7=20-4=18-6-8=
12-5=5+9=6+8-9=
4+8 =13-8= 15-5-9=
答案

7,14,17,13,16,4,7,14,5,12,5,1

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