题目内容
用简便方法计算下列各题.
×
×
(
+
)×36
×
+
×
.
| 8 |
| 17 |
| 2 |
| 3 |
| 17 |
| 8 |
(
| 2 |
| 9 |
| 5 |
| 12 |
| 4 |
| 15 |
| 3 |
| 8 |
| 11 |
| 15 |
| 3 |
| 8 |
考点:分数的简便计算
专题:运算定律及简算
分析:(1)运用乘法交换律简算;
(2)(3)运用乘法分配律简算.
(2)(3)运用乘法分配律简算.
解答:
解:(1)
×
×
=
×
×
=1×
=
;
(2)(
+
)×36
=
×36+
×36
=8+15
=23;
(3)
×
+
×
=(
+
)×
=1×
=
.
| 8 |
| 17 |
| 2 |
| 3 |
| 17 |
| 8 |
=
| 8 |
| 17 |
| 17 |
| 8 |
| 2 |
| 3 |
=1×
| 2 |
| 3 |
=
| 2 |
| 3 |
(2)(
| 2 |
| 9 |
| 5 |
| 12 |
=
| 2 |
| 9 |
| 5 |
| 12 |
=8+15
=23;
(3)
| 4 |
| 15 |
| 3 |
| 8 |
| 11 |
| 15 |
| 3 |
| 8 |
=(
| 4 |
| 15 |
| 11 |
| 15 |
| 3 |
| 8 |
=1×
| 3 |
| 8 |
=
| 3 |
| 8 |
点评:完成本题要注意分析式中数据,运用合适的简便方法计算.
练习册系列答案
相关题目