计算：0.6×9.8-2/5×50%=? 9/16×2/5+3/5÷16/9=?_数学解答

计算：0.6×9.8-2/5×50%=? 9/16×2/5+3/5÷16/9=?

人气：290 ℃　时间：2020-04-28 04:52:00

解答

0.6X9.8-2/5X50%
=0.6X(10-0.2)-1/5
=6-0.12-0.2
=6-0.32
=5.68
9/16X2/5+3/5÷16/9
=9/16X2/5+3/5X9/16
=9/16X(2/5+3/5)
=9/16X1
=9/16