题目内容
计算
(1)36+(-8)-(-2.5)-(-6)+(+1.5)
(2)(
)+(
)+(
)+(
)
(3)3.7-(-6.9)-9.5+(-5)
(4)-5
-4
+7
+2
.
(1)36+(-8)-(-2.5)-(-6)+(+1.5)
(2)(
3 |
5 |
7 |
8 |
2 |
5 |
1 |
8 |
(3)3.7-(-6.9)-9.5+(-5)
(4)-5
1 |
3 |
3 |
4 |
5 |
6 |
1 |
4 |
(1)原式=36-8+2.5+6+1.5=46-8=38;
(2)原式=(
+
)+(
+
)=1+1=2;
(3)原式=3.7+6.9-9.5-5=10.6-14.5=-3.9;
(4)原式=(-5
+7
)+(-4
+2
)=2
-2
=0.
(2)原式=(
3 |
5 |
2 |
5 |
7 |
8 |
1 |
8 |
(3)原式=3.7+6.9-9.5-5=10.6-14.5=-3.9;
(4)原式=(-5
1 |
3 |
5 |
6 |
3 |
4 |
1 |
4 |
1 |
2 |
1 |
2 |
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