-14×3/4-0.34×3/7+1/4×(-14)+4/7×-0.34(简便)
问题描述:
-14×3/4-0.34×3/7+1/4×(-14)+4/7×-0.34(简便)
答
-14×3/4-0.34×3/7+1/4×(-14)+4/7×-0.34
=-14x(3/4+1/4)-0.34x(3/7+4/7)
=-14-0.34
=-14.34