题目内容
计算下面各题,能简便的要简算.
1
×37.5%-
×0.8-0.375
÷7+
×
×
÷(
-
)
1
| 4 |
| 5 |
| 3 |
| 8 |
| 3 |
| 11 |
| 6 |
| 7 |
| 3 |
| 11 |
| 2 |
| 7 |
| 3 |
| 4 |
| 5 |
| 6 |
| 2 |
| 9 |
分析:①、②运用乘法分配律进行计算;③先算括号里面的,再算括号外面的.
解答:解:1
×37.5%-
×0.8-0.375
=(1
-0.8-1)×0.375
=0×0.375
=0;
÷7+
×
=
×(
+
)
=
×1
=
;
×
÷(
-
)
=
×
÷
=
×
=
.
| 4 |
| 5 |
| 3 |
| 8 |
=(1
| 4 |
| 5 |
=0×0.375
=0;
| 3 |
| 11 |
| 6 |
| 7 |
| 3 |
| 11 |
=
| 3 |
| 11 |
| 1 |
| 7 |
| 6 |
| 7 |
=
| 3 |
| 11 |
=
| 3 |
| 11 |
| 2 |
| 7 |
| 3 |
| 4 |
| 5 |
| 6 |
| 2 |
| 9 |
=
| 2 |
| 7 |
| 3 |
| 4 |
| 11 |
| 18 |
=
| 3 |
| 14 |
| 18 |
| 11 |
=
| 27 |
| 77 |
点评:考查了分数的简便计算和分数的四则混合运算,注意灵活运用运算律进行简便计算.
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