简便计算
|
| (1)55×25-25×45, =(55-45)×25, =10×25, =250; (2)29×201, =29×(200+1), =29×200+29×1, =5800+29, =5829; (3)101×37, =(100+1)×37, =100×37+1×37, =3700+37, =3737. |
关注公众号回复:奥数答案
即可免费获得密码查看答案

[ ]
a.12×(4+25)[ ]
a. 47+(14×5)(1)35+65=
65+35=
35+65○65+35