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计算下面各题,能用简便方法计算要用简便方法计算.45+45×19(25+16-215)×300.75×34+0.25÷435÷4+5.6×125%(274-179)÷(712÷35)[11÷(14+23)]×118.
题目详情
计算下面各题,能用简便方法计算要用简便方法计算.
| (
| 0.75×
| ||||||||||||||
5÷4+5.6×125% | (
| [11÷(
|
▼优质解答
答案和解析
(1)
+
×19
=
×(1+19)
=
×20
=16
(2)(
+
-
)×30
=
×30+
×30-
×30
=12+5-4
=13
(3)0.75×
+0.25÷
=0.75×
+0.25×
=(0.75+0.25)×
=1×
=
(4)5÷4+5.6×125%
=1.25+5.6×1.25
=(1+5.6)×1.25
=6.6×1.25
=8.25
(5)(
-
)÷(
÷
)
=
÷(
×
)
=
÷
=
×
=5
(6)[11÷(
+
4 |
5 |
4 |
5 |
=
4 |
5 |
=
4 |
5 |
=16
(2)(
2 |
5 |
1 |
6 |
2 |
15 |
=
2 |
5 |
1 |
6 |
2 |
15 |
=12+5-4
=13
(3)0.75×
3 |
4 |
4 |
3 |
=0.75×
3 |
4 |
3 |
4 |
=(0.75+0.25)×
3 |
4 |
=1×
3 |
4 |
=
3 |
4 |
(4)5÷4+5.6×125%
=1.25+5.6×1.25
=(1+5.6)×1.25
=6.6×1.25
=8.25
(5)(
27 |
4 |
17 |
9 |
7 |
12 |
3 |
5 |
=
175 |
36 |
7 |
12 |
5 |
3 |
=
175 |
36 |
35 |
36 |
=
175 |
36 |
36 |
35 |
=5
(6)[11÷(
1 |
4 |
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