-14×3/4-0.34×3/7+1/4×(-14)+4/7×-0.34

问题描述:

-14×3/4-0.34×3/7+1/4×(-14)+4/7×-0.34

-14×3/4-0.34×3/7+1/4×(-14)+4/7×-0.34
=-14×(-3/4-1/4)-0.34×(3/7+4/7)
=-14-0.34
=-14.34