题目内容
计算:
×3
+0.25×6
.
| 1 |
| 4 |
| 1 |
| 4 |
| 3 |
| 4 |
考点:分数的简便计算
专题:运算定律及简算
分析:利用乘法分配律的逆运算求解.
解答:
解:
×3
+0.25×6
=
×3
+
×6
=
×(3
+6
)
=
×10
=
.
| 1 |
| 4 |
| 1 |
| 4 |
| 3 |
| 4 |
=
| 1 |
| 4 |
| 1 |
| 4 |
| 1 |
| 4 |
| 3 |
| 4 |
=
| 1 |
| 4 |
| 1 |
| 4 |
| 3 |
| 4 |
=
| 1 |
| 4 |
=
| 5 |
| 2 |
点评:考查学生对乘法分配律的理解与运用.
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