题目内容
12
(1)12×( )=480
(2)2400÷( )=60
(43+12)÷9=
[ ]
A.7……1 B.6……1
C.5……1 D.4……1
(
(1)0.75
(2)75
(3)7.5
(4)750
仿照例子很快算出结果.
例24×15 246×15
=(24+12)×10 =(246+123)×10
=36×10 =369×10
=360 =3690
1.76×15= 2.28×15=
3.438×15= 4.672×15=