题目内容
计算:(1)(-8)×(| 1 |
| 2 |
| 1 |
| 4 |
| 1 |
| 8 |
| 1 |
| 12 |
| 1 |
| 36 |
| 3 |
| 4 |
| 1 |
| 6 |
分析:可以按照乘法分配律计算.
解答:解:(1)(-8)×(
-1
+
)=-8×
+8×
-8×
=-4+10-1=5;
(2)(-
-
+
-
)×(-48)×(-48)=
×48+
×48-
×48+
×48=4+
-36+8=-22
.
| 1 |
| 2 |
| 1 |
| 4 |
| 1 |
| 8 |
| 1 |
| 2 |
| 5 |
| 4 |
| 1 |
| 8 |
(2)(-
| 1 |
| 12 |
| 1 |
| 36 |
| 3 |
| 4 |
| 1 |
| 6 |
| 1 |
| 12 |
| 1 |
| 36 |
| 3 |
| 4 |
| 1 |
| 6 |
| 4 |
| 3 |
| 2 |
| 3 |
点评:此题考查有理数的混合运算,关键是掌握乘法分配律,还要注意符号的处理.
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