用简便方法计算下面各题 201×41 540÷45 88×125 38×99+38.
问题描述:
用简便方法计算下面各题
201×41
540÷45
88×125
38×99+38.
答
(1)201×41
=(200+1)×41
=200×41+1×41
=8200+41
=8241;
(2)540÷45
=540÷(9×5)
=540÷9÷5
=60÷5
=12;
(3)88×125
=(8×11)×125
=(8×125)×11
=1000×11
=11000;
(4)38×99+38
=38×(99+1)
=38×100
=3800.