问题
解答题
计算: (1)4.2+(-5)-(-1.2) (2)3-3÷(-
(3)(-6)2×(
|
答案
(1)原式=4.2+1.2+(-5)=5.4-5=0.4;
(2)原式=3+3×
=3+5=8;5 3
(3)原式=36×
-36×2 3
-27×1 2
=24-18-8=-2.8 27
计算: (1)4.2+(-5)-(-1.2) (2)3-3÷(-
(3)(-6)2×(
|
(1)原式=4.2+1.2+(-5)=5.4-5=0.4;
(2)原式=3+3×
=3+5=8;5 3
(3)原式=36×
-36×2 3
-27×1 2
=24-18-8=-2.8 27