题目内容
计算:
×
+
÷123.
| 12 |
| 13 |
| 61 |
| 123 |
| 6 |
| 13 |
考点:分数的简便计算
专题:运算定律及简算
分析:根据乘法分配律进行简算.
解答:
解:
×
+
÷123
=
×2×
+
×
=
×
+
×
=
×(
+
)
=
×1
=
.
| 12 |
| 13 |
| 61 |
| 123 |
| 6 |
| 13 |
=
| 6 |
| 13 |
| 61 |
| 123 |
| 6 |
| 13 |
| 1 |
| 123 |
=
| 6 |
| 13 |
| 122 |
| 123 |
| 6 |
| 13 |
| 1 |
| 123 |
=
| 6 |
| 13 |
| 122 |
| 123 |
| 1 |
| 123 |
=
| 6 |
| 13 |
=
| 6 |
| 13 |
点评:此题主要考查了乘法分配律的灵活运用,然后再进一步解答.
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