-2/3-1/6-(-1/4)-1/2 (-11又三分之二)-(-7又五分之二)-12又三分之一减去(-4.2)(-3)/[(-2/5)/(-1/4)]

问题描述:

-2/3-1/6-(-1/4)-1/2 (-11又三分之二)-(-7又五分之二)-12又三分之一减去(-4.2)
(-3)/[(-2/5)/(-1/4)]

-2/3-1/6-(-1/4)-1/2
=-4/6-1/6+1/4-2/4
=-5/6-1/4
=-10/12-3/12
=-13/12
(-11又三分之二)-(-7又五分之二)-12又三分之一减去(-4.2)
=(-11又三分之二-12又三分之一)+(7.4+4.2)
=-24+11.6
=-12.4
(-3)/[(-2/5)/(-1/4)]
=-3÷8/5
=-15/8

-2/3-1/6-(-1/4)-1/2=-5/6+1/4-1/2=-5/6-1/4=-13/4(-11又三分之二)-(-7又五分之二)-12又三分之一减去(-4.2)=-11又2/3+7.4-12又1/3+4.2=(-11又2/3-12又1/3)+11.6=-24+11.6=-12.4(-3)/[(-2/5)/(-1/4)]=-3÷8/5=-...