3928+197简便计算怎么做?
问题描述：
3928+197简便计算怎么做?
答
3928+200-3=4125
答
3928+197
=(3928+72)+(197-97)+28
=4000+100+28
=4125
答
=3928+(200-3)
=3928+200-3
=4128-3
=4125
答
3928+197=4000+200-72-3
=4200-75=4125
答
（3900+200）+（28-3）=4100+25=4125