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脱式计算.168.1÷(4.3×2-0.4)57×724+15÷45(1-1100×70)÷2797-56-1673×12.5×67×8(13-15)×45.
题目详情
脱式计算.
168.1÷(4.3×2-0.4) |
| (1-
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| (
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▼优质解答
答案和解析
(1)168.1÷(4.3×2-0.4)
=168.1÷(8.6-0.4)
=168.1÷8.2
=20.5;
(2)
×
+
÷
=
+
=
;
(3)(1-
×70)÷
=(1-
)÷
=
×
=
;
(4)
-
-
=
-(
+
)
=
-1
=
;
(5)
×12.5×
×8
=(
×
)×(12.5×8)
=2×100
=200;
(6)(
-
)×45
=
×45-
×45
=15-9
=168.1÷(8.6-0.4)
=168.1÷8.2
=20.5;
(2)
5 |
7 |
7 |
24 |
1 |
5 |
4 |
5 |
=
5 |
24 |
1 |
4 |
=
11 |
24 |
(3)(1-
1 |
100 |
2 |
7 |
=(1-
7 |
10 |
2 |
7 |
=
3 |
10 |
7 |
2 |
=
21 |
20 |
(4)
9 |
7 |
5 |
6 |
1 |
6 |
=
9 |
7 |
5 |
6 |
1 |
6 |
=
9 |
7 |
=
2 |
7 |
(5)
7 |
3 |
6 |
7 |
=(
7 |
3 |
6 |
7 |
=2×100
=200;
(6)(
1 |
3 |
1 |
5 |
=
1 |
3 |
1 |
5 |
=15-9
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