题目
(1)
(-5 )+(+2 )+(-1 )-(- )
(2)
(3)
-14+ ×[2×(-6)-(-4)2]
(4)
(-2)3×(- )+30÷(-5)-│-3│
答案: 解:(-5 34 )+(+2 37 )+(-1 14 )-(- 47 ) =[(−534)+(−114)]+(237+47) =−7+3=−4
解: (12−59+56−712)×(−36) =12×(−36)−59×(−36)+56×(−36)−712×(−36) =−18+20−30+21=−7
解:-14+ 14 ×[2×(-6)-(-4)2] =−1+14×(−12−16) =−1+(−7)=−8
解:(-2)3×(- 34 )+30÷(-5)-│-3│ =−8×(−34)+(−6)−3 =6−6−3=−3