摘要:65+30= 16-9= 87-70= 76-6= 5+70= 64-60= 13-7= 90-90= 23-12= 4+51= 12-6= 99-90= 36-26= 47-43= 22+7= 68+20-70= 95-90+70= 23+6-8= 89―21―7= 23-20+9= 87-7+20= 65+20+4= 90-80+28=
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