题目

计算: (1) 18+(-16)-(-14)-(+19) (2) (3) (4) 答案: 解:18+(-16)-(-14)-(+19) =18−16+14−19 =(18+14)−(16+19) =32−35 =−3 解: 47×(−12)+47×32−47×6 =47×(−12+32−6) =47×14 =8 解: [2+(−5)2]÷3×13−|−4|+23 =(2+25)×13×13−4+8 =3−4+8 =7 解: −14+(1−0.5)×13×[2−(−3)2] =−1+12×13×(2−9) =−1−76 =−136
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