简便运算(-3/4-5/6+7/8)*(-24) (-3/5)*3/5+8/25*(-24) (2*3*4*5 )*(1/2+1/3+1/4+1/5)
问题描述:
简便运算(-3/4-5/6+7/8)*(-24) (-3/5)*3/5+8/25*(-24) (2*3*4*5 )*(1/2+1/3+1/4+1/5)
简便运算(-3/4-5/6+7/8)*(-24) (-3/5)*3/5+8/25*(-24)
(2*3*4*5 )*(1/2+1/3+1/4+1/5)
注———比如3/5的意思是三分之五
答
(-3/4-5/6+7/8)*(-24)=-3/4*(-24)-5/6*(-24)+7/8*(-24)=18+20-21=17(-3/5)*3/5+8/25*(-24) =-9/25-8*24/25=-3*3/25-64*3/25=(-3-64)*3/25=-67*3/25=-201/25=-8又1/25(2*3*4*5 )*(1/2+1/3+1/4+1/5) =(2*3...