题目内容
用你最喜欢的方法计算.
12÷
×50%
360×25%+0.25×40
×20%+
÷
36%÷
-0.36×
.
12÷
| 3 |
| 10 |
360×25%+0.25×40
| 1 |
| 2 |
| 5 |
| 8 |
| 5 |
| 24 |
36%÷
| 9 |
| 10 |
| 8 |
| 9 |
分析:(1)按照从左到右的顺序计算;
(2)(4)运用乘法分配律简算;
(3)先同时运算乘法和除法,再算加法.
(2)(4)运用乘法分配律简算;
(3)先同时运算乘法和除法,再算加法.
解答:解:(1)12÷
×50%,
=40×50%,
=20;
(2)360×25%+0.25×40,
=(360+40)×0.25,
=400×0.25,
=100;
(3)
×20%+
÷
,
=
+3,
=3
;
(4)36%÷
-0.36×
,
=0.36×
-0.36×
,
=0.36×(
-
),
=0.36×
,
=0.08.
| 3 |
| 10 |
=40×50%,
=20;
(2)360×25%+0.25×40,
=(360+40)×0.25,
=400×0.25,
=100;
(3)
| 1 |
| 2 |
| 5 |
| 8 |
| 5 |
| 24 |
=
| 1 |
| 10 |
=3
| 1 |
| 10 |
(4)36%÷
| 9 |
| 10 |
| 8 |
| 9 |
=0.36×
| 10 |
| 9 |
| 8 |
| 9 |
=0.36×(
| 10 |
| 9 |
| 8 |
| 9 |
=0.36×
| 2 |
| 9 |
=0.08.
点评:本题考查了四则混合运算,注意运算顺序和运算法则,灵活运用所学的运算定律进行简便计算.
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