问题
计算题
用简便方法计算。
|
答案
(1)原式=(40+8)×125
=40×125+8×125
=6000
=500+400
=900
(3)原式=38×(64+35+1)
=38×100
=3800
=63×10
=630
改错题
用简便方法计算。
|
(1)原式=(40+8)×125
=40×125+8×125
=6000
=500+400
=900
(3)原式=38×(64+35+1)
=38×100
=3800
=63×10
=630