Question

计算这道题，能简便的用简便方法算。201×2/5-40%

写出过程

Answer 1

2/5=2除以5=0点四，等于40%，40%相当于是百分之40×1，现在这到式子里面有40%这个公因数，运用乘法分配率变成40%乘以(201-1),等于百分之40×200等于80

Answer 2

因为40％化成分数，等于2/5，所以
上式=201×2/5-2/5
=（201-1）×2/5
=200×2/5
=80

Answer 3

201*2/5-40%
=201*2/5-2/5
=（200-1）*2/5
=200*2/5
=80

Answer 4

100乘百分之40+1乘百分之40-2/5=40+0点4-2/5=40点5-2/5=40

Answer 5

201×2/5-40%
=201×2/5-2/5
=201×2/5-1×2/5
=(201-1)×2/5
=200×2/5
=40×2
=80