题目内容
计算
|
| (1)解:原式=17-[-(8÷2)+[-(4×3)] =17-[-4+(-12)] =17-(-16) =33 |
(2)解:原式=( = =-2+1+ =- |
| (3)原式=-9-9×(-2)-[(-2)×1] =-9+18+2 =21 |
(4)原式= -9× =-3×[-15+15] =-3×0 =0 |
| (5)原式=[50-( =[50-( =[50-(28-33+6)]÷49 =(50-1)÷49 =49÷49 =1 |
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