【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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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!
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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