题目内容
计算:(1
-
-
)÷
= .
| 3 |
| 4 |
| 7 |
| 8 |
| 7 |
| 12 |
| 7 |
| 8 |
考点:分数的四则混合运算,运算定律与简便运算
专题:运算顺序及法则,运算定律及简算
分析:根据乘法分配律进行简算.
解答:
解:(1
-
-
)÷
=(1
-
-
)×
=1
×
-
×
-
×
=2-1-
=1-
=
.
故答案为:
.
| 3 |
| 4 |
| 7 |
| 8 |
| 7 |
| 12 |
| 7 |
| 8 |
=(1
| 3 |
| 4 |
| 7 |
| 8 |
| 7 |
| 12 |
| 8 |
| 7 |
=1
| 3 |
| 4 |
| 8 |
| 7 |
| 7 |
| 8 |
| 8 |
| 7 |
| 7 |
| 12 |
| 8 |
| 7 |
=2-1-
| 2 |
| 3 |
=1-
| 2 |
| 3 |
=
| 1 |
| 3 |
故答案为:
| 1 |
| 3 |
点评:考查了运算定律与简便运算,四则混合运算.注意运算顺序和运算法则,灵活运用所学的运算定律简便计算.
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