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用递等式计算.5304-5304÷221+22019.5×0.2-2.07÷23(89+123−127)×634.8×512+7.2÷225334+334×225−225÷115[2-(123−1.5)÷1512]×638
题目详情
用递等式计算. 5304-5304÷221+220 | 19.5×0.2-2.07÷23 | (
| ||||||||||||||||||||
4.8×
| 3
| [2-(1
|
▼优质解答
答案和解析
(1)5304-5304÷221+220
=5304-24+220
=5280+220
=5500;
(2)19.5×0.2-2.07÷23
=3.9-0.09
=3.81;
(3)(
+1
−1
)×63
=
×63+1
×63-1
×63
=56+105-81
=161-81
=80;
(4)4.8×
+7.2÷2
=4.8×
+7.2×
=(4.8+7.2)×
=12×
=5;
(5)3
+3
×2
−2
÷1
=3
×(1+2
)-2
×
=3
×3
-2
×
=12
-2
=10
;
(6)[2-(1
−1.5)÷1
]×6
=[2-
÷1
]×
=5304-24+220
=5280+220
=5500;
(2)19.5×0.2-2.07÷23
=3.9-0.09
=3.81;
(3)(
8 |
9 |
2 |
3 |
2 |
7 |
=
8 |
9 |
2 |
3 |
2 |
7 |
=56+105-81
=161-81
=80;
(4)4.8×
5 |
12 |
2 |
5 |
=4.8×
5 |
12 |
5 |
12 |
=(4.8+7.2)×
5 |
12 |
=12×
5 |
12 |
=5;
(5)3
3 |
4 |
3 |
4 |
2 |
5 |
2 |
5 |
1 |
5 |
=3
3 |
4 |
2 |
5 |
2 |
5 |
5 |
6 |
=3
3 |
4 |
2 |
5 |
2 |
5 |
5 |
6 |
=12
3 |
4 |
=10
3 |
4 |
(6)[2-(1
2 |
3 |
5 |
12 |
3 |
8 |
=[2-
1 |
6 |
5 |
12 |
作业帮用户
2017-09-18
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