1.-3/4×(8-1又1/3-14/15)2.(-5)×3/13+(-5)×(-2/13)-5×1/13×(-14/13)×(-_数学解答

1.-3/4×(8-1又1/3-14/15)
2.(-5)×3/13+(-5)×(-2/13)-5×1/13×(-14/13)×(-8)
3.9又18/19×19

人气：442 ℃　时间：2020-02-04 06:16:46

解答

1.-3/4x(8-1又1/3-14/15)=-3/4X8-(-3/4X4/3)-(-3/4X14/15)=-2/3+1+7/10=31/302.(-5)×3/13+(-5)×(-2/13)-5×1/13×(-14/13)×(-8)=(-5X3+5X2-5X1+14X8)/13=102/133.9又18/19×19=(9x19+18)/19x19=189