题目内容
用简便方法计算下列各题:
(1)(
+
-
)×12;
(2)(-125+
)÷(-5).
(1)(
1 |
4 |
1 |
6 |
1 |
2 |
(2)(-125+
5 |
7 |
(1)原式=
×12+
×12-
×12=3+2-6=-1;
(2)原式=125×
-
×
=24
.
1 |
4 |
1 |
6 |
1 |
2 |
(2)原式=125×
1 |
5 |
5 |
7 |
1 |
5 |
6 |
7 |
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