题目
计算题
(1)
(2)
24+(-15)+(-20)-(-5)
(3)
(-24)×( )
(4)
答案: 解: 1+(−2)+|−2−3|−5=1−2+5−5=−1 ;
解:24+(-15)+(-20)-(-5) =24-15-20+5 = −6 ;
解: (−24)×(16−113+0.75) = (−24)×(16−43+34) = (−24)×16−(−24)×43+(−24)×34 = −4+32−18 =10;
解: −3−[−5×(1−0.2×35)]÷(−2) = −3−[−5×(1−325)]÷(−2) = −3−[−5×2225]×(−12) = −3−(−225)×(−12) = −3−115 = −265 ;