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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】
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更新时间:2024-04-20 07:48:45
问题描述:

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

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X^N代表乘方!

X/C代表分数!

陈良刚回答:
  -|-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
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