【初一的几个数学计算题,想对下答案,大家把计算的步骤写出来哦-查字典问答网
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  【初一的几个数学计算题,想对下答案,大家把计算的步骤写出来哦,50分!-|-2.5^2x(-1)^10|x1/8(0.5)^3-7.2÷{[2又3/2÷(-2)^3]÷[-|0.25^2|x2.5]}3又11/18+(-1)^3x4又5/271+36又5/271-(-1)^5x2又7/18(-1)^2x5+(-1)x5^2-1^2x5+(-1x5)^23^4x1】

  初一的几个数学计算题,想对下答案,大家把计算的步骤写出来哦,50分!

  -|-2.5^2x(-1)^10|x1/8(0.5)^3

  -7.2÷{[2又3/2÷(-2)^3]÷[-|0.25^2|x2.5]}

  3又11/18+(-1)^3x4又5/271+36又5/271-(-1)^5x2又7/18

  (-1)^2x5+(-1)x5^2-1^2x5+(-1x5)^2

  3^4x1/27+(-2)^2x1/2÷2

  (-1/3^4)-(-1/3)^4-(1/3)2÷1/3^2

  1÷6x(-2-3)^2÷1/2x1/3

  (-3)^2÷(3x2)x(-3-2)

  1/4x[3.271-(-1)^31x5.729]÷(-3^2)

  3x(-2)^2+(-2x3)^2+(-2+3)^2

  ---------------------------------------------

  X^N代表乘方!

  X/C代表分数!

1回答
2020-07-23 15:11
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陈良刚

  -|-2.5^2x(-1)^10|x1/8(0.5)^3

  =-|-6.25x1|x1/8x0.125

  =-|6.25|x1/8x0.125

  =-|6.25|x1/8x1/8

  =-6.25x1/64

  =-25/256

  -7.2÷{[2又3/2÷(-2)^3]÷[-|0.25^2|x2.5]}

  =-7.2÷{[7/2÷(-8)]÷[-|1/4^2|x5/2]}

  =-7.2÷{-7/16÷[-1/16x5/2]}

  =-7.2÷{-7/16÷(-5/32)}

  =-7.2÷14/5

  =-18/7

  3又11/18+(-1)^3x4又5/271+36又5/271-(-1)^5x2又7/18

  =3又11/18+(-1)x4又5/271+36又5/271-(-1)*x2又7/18

  =3又11/18-4又5/271+36又5/271+2又7/18

  =3又11/18+2又7/18-4又5/271+36又5/271

  =6+32

  =38

  (-1)^2x5+(-1)x5^2-1^2x5+(-1x5)^2

  =1*5+(-1)*25-1*5+(-5)^2

  =5-25-5+25

  =0

  3^4x1/27+(-2)^2x1/2÷2

  =3^4x1/3^3+(-2)^2x1/2÷2

  =3+4x1/2÷2

  =3+4x1/2x1/2

  =3+1

  =4

  (-1/3^4)-(-1/3)^4-(1/3)2÷1/3^2

  =-1/3^4-1/3^4-1/3^2*3^2

  =-2/3^4-1

  =-2/729-1

  =-731/129

  1÷6x(-2-3)^2÷1/2x1/3

  =1÷6x(-5)^2÷1/2x1/3

  =1÷6x25÷1/2x1/3

  =1x1/6x25x2x1/3

  =25/9

  (-3)^2÷(3x2)x(-3-2)

  =9÷6x(-5)

  =9x1/6x(-5)

  =-3/10

  1/4x[3.271-(-1)^31x5.729]÷(-3^2)

  =1/4x[3.271-(-1)x5.279]÷(-9)

  =1/4x[3.271+5.279]÷(-9)

  =1/4x9÷(-9)

  =1/4x9x(-1/9)

  =-1/4

  3x(-2)^2+(-2x3)^2+(-2+3)^2

  =3x(-2)^2+(-6)^2+1^2

  =3x4+36+1

  =12+36+1

  =49

2020-07-23 15:14:47

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