问题
解答题
计算 (1)36+(-8)-(-2.5)-(-6)+(+1.5) (2)(
(3)3.7-(-6.9)-9.5+(-5) (4)-5
|
答案
(1)原式=36-8+2.5+6+1.5=46-8=38;
(2)原式=(
+3 5
)+(2 5
+7 8
)=1+1=2;1 8
(3)原式=3.7+6.9-9.5-5=10.6-14.5=-3.9;
(4)原式=(-5
+71 3
)+(-45 6
+23 4
)=21 4
-21 2
=0.1 2