3928+197简便计算怎么做?
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3928+197简便计算怎么做?3928+197简便计算怎么做?3928+197简便计算怎么做?(3900+200)+(28-3)=4100+25=41253928+197=4000+200-72-3
3928+197简便计算怎么做?
3928+197简便计算怎么做?
3928+197简便计算怎么做?
(3900+200)+(28-3)=4100+25=4125
3928+197=4000+200-72-3
=4200-75=4125
3928+200-3=4125
3928+197
=(3928+72)+(197-97)+28
=4000+100+28
=4125
=3928+(200-3)
=3928+200-3
=4128-3
=4125