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递等式计算69.58-17.5+13.42-2.512.5×3.2×2.53.64÷4+4.36×0.2512×(512+725)×25.
题目详情
递等式计算
69.58-17.5+13.42-2.5
12.5×3.2×2.5
3.64÷4+4.36×0.25
12×(
+
)×25.
69.58-17.5+13.42-2.5
12.5×3.2×2.5
3.64÷4+4.36×0.25
12×(
5 |
12 |
7 |
25 |
▼优质解答
答案和解析
(1)69.58-17.5+13.42-2.5
=(69.58+13.42)-(17.5+2.5)
=83-20
=63;
(2)12.5×3.2×2.5
=12.5×(8×0.4)×2.5
=(12.5×8)×(0.4×2.5)
=100×1
=100;
(3)3.64÷4+4.36×0.25
=3.64×0.25+4.36×0.25
=(3.64+4.36)×0.25
=8×0.25
=2;
(4)12×(
+
)×25
=12×
×25+12×
×25
=125+84
=209.
=(69.58+13.42)-(17.5+2.5)
=83-20
=63;
(2)12.5×3.2×2.5
=12.5×(8×0.4)×2.5
=(12.5×8)×(0.4×2.5)
=100×1
=100;
(3)3.64÷4+4.36×0.25
=3.64×0.25+4.36×0.25
=(3.64+4.36)×0.25
=8×0.25
=2;
(4)12×(
5 |
12 |
7 |
25 |
=12×
5 |
12 |
7 |
25 |
=125+84
=209.
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