题目内容
运用运算定律简算:
(1)(
|
(2)
|
分析:(1)直接利用乘法的分配律进行简便计算即可解答;
(2)先把原式变形为:
×
+
×
,再利用乘法的分配律的逆应用进行简便计算即可解答.
(2)先把原式变形为:
| 37 |
| 93 |
| 1 |
| 7 |
| 1 |
| 7 |
| 26 |
| 93 |
解答:解:(1)(
+
)×24,
=
×24+
×24,
=16+6,
=22;
(2)
÷7+
×
,
=
×
+
×
,
=(
+
)×
,
=
×
,
=
.
| 2 |
| 3 |
| 1 |
| 4 |
=
| 2 |
| 3 |
| 1 |
| 4 |
=16+6,
=22;
(2)
| 37 |
| 93 |
| 1 |
| 7 |
| 26 |
| 93 |
=
| 37 |
| 93 |
| 1 |
| 7 |
| 1 |
| 7 |
| 26 |
| 93 |
=(
| 37 |
| 93 |
| 26 |
| 93 |
| 1 |
| 7 |
=
| 63 |
| 93 |
| 1 |
| 7 |
=
| 3 |
| 31 |
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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运用运算定律简算:
| (1)( | (2) |