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(2012•四川)脱式计算.546+785-146=2.7×4.8+2.7×5.2=45×94÷75=0.4×(2.5×73)89÷(56−34)512×113−14÷13.
题目详情
(2012•四川)
脱式计算. 546+785-146= | 2.7×4.8+2.7×5.2= | ||||||||||||
| 0.4×(2.5×73) | ||||||||||||
|
|
▼优质解答
答案和解析
(1)546+785-146,
=546-146+785,
=400+785,
=1185;
(2)2.7×4.8+2.7×5.2,
=2.7×(4.8+5.2),
=2.7×10,
=27;
(3)
×
÷
,
=
÷
,
=
;
(4)0.4×(2.5×73),
=(0.4×2.5)×73,
=1×73,
=73;
(5)
÷(
−
),
=
÷
,
=
;
(6)
×
−
÷13,
=
×
−
×
,
=(
−
)×
,
=
×
,
=
.
(1)546+785-146,
=546-146+785,
=400+785,
=1185;
(2)2.7×4.8+2.7×5.2,
=2.7×(4.8+5.2),
=2.7×10,
=27;
(3)
4 |
5 |
9 |
4 |
7 |
5 |
=
9 |
5 |
7 |
5 |
=
9 |
7 |
(4)0.4×(2.5×73),
=(0.4×2.5)×73,
=1×73,
=73;
(5)
8 |
9 |
5 |
6 |
3 |
4 |
=
8 |
9 |
1 |
12 |
=
32 |
3 |
(6)
5 |
12 |
1 |
13 |
1 |
4 |
=
5 |
12 |
1 |
13 |
1 |
4 |
1 |
13 |
=(
5 |
12 |
1 |
4 |
1 |
13 |
=
1 |
6 |
1 |
13 |
=
1 |
78 |
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