题目内容
简算:6
×25-2
×4
.
| 7 |
| 15 |
| 1 |
| 2 |
| 7 |
| 15 |
考点:分数的简便计算
专题:运算定律及简算
分析:首先将各个分数化成假分数,整理后再根据乘法分配律的逆运用简算即可.
解答:
解:6
×25-2
×4
=
×25-
×
=
×5-
=
×5-
=
×970-
×67
=
×(970-67)
=
×903
=
=150.5
| 7 |
| 15 |
| 1 |
| 2 |
| 7 |
| 15 |
=
| 97 |
| 15 |
| 5 |
| 2 |
| 67 |
| 15 |
=
| 97 |
| 3 |
| 67 |
| 6 |
=
| 2×97 |
| 6 |
| 67 |
| 6 |
=
| 1 |
| 6 |
| 1 |
| 6 |
=
| 1 |
| 6 |
=
| 1 |
| 6 |
=
| 903 |
| 6 |
=150.5
点评:此题考查了乘法运算定律在分数四则混合运算中的运用.
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