题目内容
75×
|
(
| ||||||||||||
3÷
|
|
分析:(1)(4)运用乘法分配律解答,
(2)按照先算括号里面的,再算括号外面的顺序解答,
(3)依据除法性质解答.
(2)按照先算括号里面的,再算括号外面的顺序解答,
(3)依据除法性质解答.
解答:解:(1)75×
+24×
+
,
=(75+24+1)×
,
=100×
,
=60;
(2)(
-
)÷
,
=
÷
,
=1.5;
(3)3÷
÷
÷4,
=3÷(
×
×4),
=3÷1,
=3;
(4)
÷8+
×
,
=(
+
)×
,
=
×
,
=
.
| 3 |
| 5 |
| 3 |
| 5 |
| 3 |
| 5 |
=(75+24+1)×
| 3 |
| 5 |
=100×
| 3 |
| 5 |
=60;
(2)(
| 13 |
| 2 |
| 19 |
| 8 |
| 11 |
| 4 |
=
| 33 |
| 8 |
| 11 |
| 4 |
=1.5;
(3)3÷
| 1 |
| 3 |
| 3 |
| 4 |
=3÷(
| 1 |
| 3 |
| 3 |
| 4 |
=3÷1,
=3;
(4)
| 9 |
| 13 |
| 1 |
| 8 |
| 7 |
| 13 |
=(
| 9 |
| 13 |
| 7 |
| 13 |
| 1 |
| 8 |
=
| 16 |
| 13 |
| 1 |
| 8 |
=
| 2 |
| 13 |
点评:成本题要注意分析式中数据,运用合适的简便方法计算,注意计算的顺序.
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