题目内容
计算:(1)(+| 1 |
| 4 |
| 1 |
| 3 |
| 3 |
| 4 |
| 2 |
| 3 |
(2)(-5
| 1 |
| 2 |
| 4 |
| 11 |
(3)(
| 2 |
| 9 |
| 1 |
| 4 |
| 1 |
| 18 |
| 1 |
| 36 |
(4)-32×
| 1 |
| 3 |
| 3 |
| 5 |
| 1 |
| 4 |
分析:对于一般的有理数混合运算来讲,其运算顺序是先乘方,再乘除,最后算加减,如果遇括号要先算括号里面的.在此基础上,有时也应该根据具体问题的特点,灵活应变,注意方法.
解答:解:(1)原式=
-
+
-
=3-6
=-3;
(2)原式=-
×
-8×
=-2-4
=-6;
(3)原式=
×(-36)
=-1;
(4)原式=-9×
-[25×(-
)+60×
-2]
=-3-(-15+15-2)
=-3+2
=-1.
| 1 |
| 4 |
| 7 |
| 3 |
| 11 |
| 4 |
| 11 |
| 3 |
=3-6
=-3;
(2)原式=-
| 11 |
| 2 |
| 4 |
| 11 |
| 1 |
| 2 |
=-2-4
=-6;
(3)原式=
| 8-9+2 |
| 36 |
=-1;
(4)原式=-9×
| 1 |
| 3 |
| 3 |
| 5 |
| 1 |
| 4 |
=-3-(-15+15-2)
=-3+2
=-1.
点评:此题的关键是要先把带分数化成假分数,异分数的还要先通分,然后再进行加减.
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