题目内容
简算.
×0.375+
÷
; (
-
)×54.
| 7 |
| 8 |
| 3 |
| 8 |
| 8 |
| 9 |
| 1 |
| 6 |
| 5 |
| 54 |
考点:分数的简便计算
专题:运算定律及简算
分析:(1)先把0.375化为分数是
,把除法转化为乘法,再运用乘法分配律计算即可.
(2)运用乘法分配律计算即可.
| 3 |
| 8 |
(2)运用乘法分配律计算即可.
解答:
解:(1)
×0.375+
÷
=
×
+
×
=
×(
+
)
=
×2
=
(2)(
-
)×54
=
×54-
×54
=9-5
=4
| 7 |
| 8 |
| 3 |
| 8 |
| 8 |
| 9 |
=
| 7 |
| 8 |
| 3 |
| 8 |
| 3 |
| 8 |
| 9 |
| 8 |
=
| 3 |
| 8 |
| 7 |
| 8 |
| 9 |
| 8 |
=
| 7 |
| 8 |
=
| 7 |
| 4 |
(2)(
| 1 |
| 6 |
| 5 |
| 54 |
=
| 1 |
| 6 |
| 5 |
| 54 |
=9-5
=4
点评:本题主要考查乘法分配律的灵活应用.
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