题目内容
计算,能简算的要简算.
(
|
12×(
|
|
分析:(1)、(2)运用乘法分配律进行计算即可;
(3)先算除法,最后再算加法,按此顺序进行计算即可.
(3)先算除法,最后再算加法,按此顺序进行计算即可.
解答:解:(1)(
+
)×13×16,
=16×13×
+
×13×16,
=16+13,
=29;
(2)12×(
+
+
),
=12×
+12×
+12×
,
=4+6+2,
=12;
(3)
÷5+5÷
,
=
×
+5×
,
=
+9,
=9
.
| 1 |
| 13 |
| 1 |
| 16 |
=16×13×
| 1 |
| 13 |
| 1 |
| 16 |
=16+13,
=29;
(2)12×(
| 1 |
| 3 |
| 1 |
| 2 |
| 1 |
| 6 |
=12×
| 1 |
| 3 |
| 1 |
| 2 |
| 1 |
| 6 |
=4+6+2,
=12;
(3)
| 5 |
| 9 |
| 5 |
| 9 |
=
| 5 |
| 9 |
| 1 |
| 5 |
| 9 |
| 5 |
=
| 1 |
| 9 |
=9
| 1 |
| 9 |
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