1497+496 18.95-7.98 用简便运算做,_数学解答

1497+496 18.95-7.98 用简便运算做,

人气：312 ℃　时间：2020-04-07 07:35:35

解答

1497+496
=1500-3+500-4
=1500+500-3-7
=2000-7
=1993
18.95-7.98
=18.95-7.95-0.03
=11-0.03
=10.97