100*(7/10-1/5+2/1-0.01)=______ (-2/1)*(-7/4)*(-8)=________ 两道题请大虾们帮帮小妹
问题描述:
100*(7/10-1/5+2/1-0.01)=______ (-2/1)*(-7/4)*(-8)=________ 两道题请大虾们帮帮小妹
答
100*(7/10-1/5+2/1-0.01)
=100*(7/10-2/10+5/10-0.01)
=100*0.09
=9
(-2/1)*(-7/4)*(-8)
=7/8*(-8)
=-7