计算,能简算的要简算.要详细的简算过程.
[14/9-(2/5+4/9)]÷2/45
=(14/9-4/9-2/5)×45/2
=
=
=16
↑把第三四步补上,要简算哦!!!!!
计算,能简算的要简算.要详细的简算过程.
[14/9-(2/5+4/9)]÷2/45
=(14/9-4/9-2/5)×45/2
=
=
=16
↑把第三四步补上,要简算哦!!!!!
=(14/9-4/9-2/5)×45/2
=10/9×45/2-2/5×45/2(运用乘法分配律,在约分)
=25-9
=16