题目内容
计算题:(1)(-1.5)2-(-3| 1 |
| 3 |
| 1 |
| 4 |
| 2 |
| 3 |
| 1 |
| 2 |
| 1 |
| 2 |
| 1 |
| 3 |
分析:一般的有理数混合运算的计算题,解答问题的关键是要牢记有理数混合运算的顺序.
解答:解:(1)原式=
+
-
-
,
=
-
,
=
(2)原式=-
+
-
(-8-1),
=-
+
-
×(-9),
=
+3,
=3
| 9 |
| 4 |
| 10 |
| 3 |
| 9 |
| 4 |
| 2 |
| 3 |
=
| 10 |
| 3 |
| 2 |
| 3 |
=
| 8 |
| 3 |
(2)原式=-
| 3 |
| 2 |
| 9 |
| 4 |
| 1 |
| 3 |
=-
| 3 |
| 2 |
| 9 |
| 4 |
| 1 |
| 3 |
=
| 3 |
| 4 |
=3
| 3 |
| 4 |
点评:本题主要考查有理数混合运算的一般计算,牢记运算顺序:有括号的先算括号里面的,再算乘除,后算加减.
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