题目内容
| 能简算的要简算. 48×(
|
23-
|
|
分析:①③运用乘法的分配律进行计算即可.②按照四则混合运算的顺序进行计算,先算乘除后算加减.
解答:解:①48×(
+
)÷
,
=(48×
+48×
)×
,
=(28+40)×
,
=68×
,
=102;
②23-
×
÷
,
=23-
×27,
=23-18,
=5;
③
×7+
×11,
=
×(7+11),
=
×18,
=10;
| 7 |
| 12 |
| 5 |
| 6 |
| 2 |
| 3 |
=(48×
| 7 |
| 12 |
| 5 |
| 6 |
| 3 |
| 2 |
=(28+40)×
| 3 |
| 2 |
=68×
| 3 |
| 2 |
=102;
②23-
| 8 |
| 9 |
| 3 |
| 4 |
| 1 |
| 27 |
=23-
| 2 |
| 3 |
=23-18,
=5;
③
| 5 |
| 9 |
| 5 |
| 9 |
=
| 5 |
| 9 |
=
| 5 |
| 9 |
=10;
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.
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