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(2011•郑州模拟)计算,能简算的要简算:(1)1÷4÷8÷0.25÷12.5(2)9.75-5.42-(0.25+2.58)(3)835×2.7+6.2×1.4+3.5×8.6(4)[15+(20-4.7)×623]÷102.2.
题目详情
(2011•郑州模拟)计算,能简算的要简算:
(1)1÷4÷8÷0.25÷12.5
(2)9.75-5.42-(0.25+2.58)
(3)8
×2.7+6.2×1.4+3.5×8.6
(4)[
+(20-4.7)×6
]÷102.2.
(1)1÷4÷8÷0.25÷12.5
(2)9.75-5.42-(0.25+2.58)
(3)8
3 |
5 |
(4)[
1 |
5 |
2 |
3 |
▼优质解答
答案和解析
(1)1÷4÷8÷0.25÷12.5,=1÷(4×8×0.25×12.5),=1÷[(4×0.25)×(8×12.5)],=1÷(1×100),=1÷100,=0.01;(2)9.75-5.42-(0.25+2.58),=9.75-5.42-0.25-2.58,=(9.75-0.25)-(5.42+2.58),=9...
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