因为a÷b=2,所以a是b的倍数,b是a的因数. .
2个8=( )个4=( )个2
1个8=( )个4=( )个2
( )×2=80( )×4=80( )×8=80
( )×2=72( )×4=72( )×8=72
( )×2=64( )×4=64( )×8=64