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(2014•泉州模拟)用递等式计算102×22-1428÷144.7-0.7×1.5-0.958.75×3.6+12.5×0.3613÷[(23+15)×113]
题目详情
(2014•泉州模拟)
用递等式计算 102×22-1428÷14 | 4.7-0.7×1.5-0.95 | 8.75×3.6+12.5×0.36 |
|
▼优质解答
答案和解析
(1)102×22-1428÷14
=2244-102
=2142;
(2)4.7-0.7×1.5-0.95
=4.7-1.05-0.95
=4.7-(1.05+0.95)
=4.7-2
=2.7;
(3)8.75×3.6+12.5×0.36
=8.75×3.6+1.25×3.6
=(8.75+1.25)×3.6
=10×3.6
=36;
(4)
÷[(
+
)×
]
=
÷[
×
]
=
÷
=5.
=2244-102
=2142;
(2)4.7-0.7×1.5-0.95
=4.7-1.05-0.95
=4.7-(1.05+0.95)
=4.7-2
=2.7;
(3)8.75×3.6+12.5×0.36
=8.75×3.6+1.25×3.6
=(8.75+1.25)×3.6
=10×3.6
=36;
(4)
1 |
3 |
2 |
3 |
1 |
5 |
1 |
13 |
=
1 |
3 |
13 |
15 |
1 |
13 |
=
1 |
3 |
1 |
15 |
=5.
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