数学有理数计算(1)(-3/4-7/8)除以(-7/8)(2)(-1)除以3*(-1/3)(3)49又25分之24*(-5)(4)(-6)*8-(-5)*(-9)(5)【4又2/3*(-5/14)+(-0.4)除以(-4/25)】*1又1/5(6)1又1/2*5/7-(-5/
来源:学生作业帮助网 编辑:六六作业网 时间:2024/11/16 23:30:42
数学有理数计算(1)(-3/4-7/8)除以(-7/8)(2)(-1)除以3*(-1/3)(3)49又25分之24*(-5)(4)(-6)*8-(-5)*(-9)(5)【4又2/3*(-5/14)+(-0.4)除以(-4/25)】*1又1/5(6)1又1/2*5/7-(-5/
数学有理数计算
(1)(-3/4-7/8)除以(-7/8)
(2)(-1)除以3*(-1/3)
(3)49又25分之24*(-5)
(4)(-6)*8-(-5)*(-9)
(5)【4又2/3*(-5/14)+(-0.4)除以(-4/25)】*1又1/5
(6)1又1/2*5/7-(-5/7)*2又1/2+(-1/2)*5/7(7)1-(-1/2)²+(-1)的4次方-(-3/4)
数学有理数计算(1)(-3/4-7/8)除以(-7/8)(2)(-1)除以3*(-1/3)(3)49又25分之24*(-5)(4)(-6)*8-(-5)*(-9)(5)【4又2/3*(-5/14)+(-0.4)除以(-4/25)】*1又1/5(6)1又1/2*5/7-(-5/
1.原式=(-6/8-7/8)×8/7
=-1/8×8/7
=-1/7
2.原式=-1/3÷(-1/3)
=1
3.原式=50×(-5)-1/25×(-5)
=-250+1/5
=-249又5分之4
4.原式=(-48)-45
=-93
5.原式=[-5/3+(-5/4)]×6/5
=[-20/12+(-15/12)]×6/5
=-37/12×6/5
=-37/10
6.原式=15/14-(-25/14)+(-5/14)
=15/14+25/14-5/14
=5/2
7.原式=1-1/4+1+3/4
=5/2
(1)(-3/4-7/8)÷(-7/8)=6/7+1=13/7
(2)(-1)÷3×(-1/3)=1/9
(3)49又25分之24*(-5)=249 4/5
(4)(-6)*8-(-5)*(-9)=-93
(5)【4又2/3*(-5/14)+(-0.4)除以(-4/25)】*1又1/5=(-5/3+2.5)×6/5=1
(6)1又1/2*5/7-(-5/7)...
全部展开
(1)(-3/4-7/8)÷(-7/8)=6/7+1=13/7
(2)(-1)÷3×(-1/3)=1/9
(3)49又25分之24*(-5)=249 4/5
(4)(-6)*8-(-5)*(-9)=-93
(5)【4又2/3*(-5/14)+(-0.4)除以(-4/25)】*1又1/5=(-5/3+2.5)×6/5=1
(6)1又1/2*5/7-(-5/7)*2又1/2+(-1/2)*5/7=15/14+25/14-5/14=5/2
(7)1-(-1/2)²+(-1)的4次方-(-3/4)=1-1/4+1=7/4
过程有点简单,希望对你有帮助
收起
用计算器,百度科学计算器!
(1)13/7
(2)1/9
(3)-1249/5
(4)-93
(5)1
(6)看不懂
1 13/7
2 负一除以3乘负三分之一的积,答案是1;负一除以三,再乘三分之一,求积,答案是九分之一
3 -249又5分之4
4 -93
5 1
6 2又2分之1
7 2又2分之1