1994.4×3.6+2006.9×6.4简算_数学解答

1994.4×3.6+2006.9×6.4简算

人气：103 ℃　时间：2020-04-08 22:17:10

解答

=1994.4X(3.6+6.4)+(2006.9-1994.4)X6.4
=1994.4X10+12.5X6.4
=19944+12.5X8X0.8
=19944+100X0.8
=19944+80
=20024