来自李开德的问题
用简便方法计算下面各题201×41540÷4588×12538×99+38.
用简便方法计算下面各题
201×41
540÷45
88×125
38×99+38.
1回答
2020-07-15 16:06
用简便方法计算下面各题201×41540÷4588×12538×99+38.
用简便方法计算下面各题
201×41
540÷45
88×125
38×99+38.
(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.