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 ;
数学 试题推荐
最近更新