一个三角形的底扩大4倍,高缩小2倍,则面积______倍.
因为平行四边形的面积=底×高,若底扩大4倍,高缩小2倍,
那么面积就扩大4÷2=2倍.
故答案为:2.
Has John ____ Beijing _____ Shanghai?
A.leaving; to
B.left; to
C.left; for
D.leaving for
两个数之差为5,之积是84,设较小的数是x,则所列方程为 ______.