题目内容
计算:(3
+6
+1
+8
)×(2-
).
| 1 |
| 4 |
| 2 |
| 3 |
| 3 |
| 4 |
| 1 |
| 3 |
| 7 |
| 20 |
考点:分数的简便计算
专题:运算定律及简算
分析:利用加法交换律、结合律计算即可.
解答:
解:(3
+6
+1
+8
)×(2-
)
=[(3
+1
)+(6
+8
)]×(2-
)
=20×
=33.
| 1 |
| 4 |
| 2 |
| 3 |
| 3 |
| 4 |
| 1 |
| 3 |
| 7 |
| 20 |
=[(3
| 1 |
| 4 |
| 3 |
| 4 |
| 2 |
| 3 |
| 1 |
| 3 |
| 7 |
| 20 |
=20×
| 33 |
| 20 |
=33.
点评:此题考查了运用简便方法简算的能力.
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