3/5×153-0.6×53
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3/5×153-0.6×533/5×153-0.6×533/5×153-0.6×533/5×153-0.6×53=3/5×153-3/5×53=3/5×(153-53)=3/5×100=60（0.6=
3/5×153-0.6×53
3/5×153-0.6×53
3/5×153-0.6×53
3/5×153-0.6×53
=3/5×153-3/5×53
=3/5×(153-53)
=3/5×100
=60
（ 0.6=3/5 ）请参考!