Question

12.5乘{- 2又3分之1}乘{-8}乘7分之3 {-4分之1+6分之1-8分之1+12分之1}乘{-24} -8分之

Answer 1

12.5乘{- 2又3分之1}乘{-8}乘7分之3

=12.5*(-8)*(-7/2)*3/7

=-100*(-3/2)

=150

{-4分之1+6分之1-8分之1+12分之1}乘{-24}

=-1/4*(-24)+1/6*(-24)-1/8*(-24)+1/12*(-24)

=6-4+3-2

=3

-8分之5乘{16-3又5分之1+0.0

=-5/8*16+5/8*16/5

=-10+2

=-8

52又14分之13乘{-7}

=(52+13/14)*(-7)

=-52*7-13/14*7

=-364-13/2

=-370.5