35.8*1.2-5.8*1.2=?2.84*(8.5-1.2)=?12.5*32*0.25=?简便方法
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35.8*1.2-5.8*1.2=?2.84*(8.5-1.2)=?12.5*32*0.25=?简便方法
![35.8*1.2-5.8*1.2=?2.84*(8.5-1.2)=?12.5*32*0.25=?简便方法](/uploads/image/z/359489-65-9.jpg?t=35.8%2A1.2-5.8%2A1.2%3D%3F2.84%2A%EF%BC%888.5-1.2%EF%BC%89%3D%3F12.5%2A32%2A0.25%3D%3F%E7%AE%80%E4%BE%BF%E6%96%B9%E6%B3%95)
(35.8-5.8) x 1.2
=30 x 1.2
=36
12.5 x (8 x 4) x 0.25
=100 x 1
=100
2.84 x (8.5-1-0.2)
=2.84 x 8.5-2.84-0.568
=1.42+22.92-2.84-0.568
=1.42+20.08-0.568
=21.5-0.568
=20.932
=30 x 1.2
=36
12.5 x (8 x 4) x 0.25
=100 x 1
=100
2.84 x (8.5-1-0.2)
=2.84 x 8.5-2.84-0.568
=1.42+22.92-2.84-0.568
=1.42+20.08-0.568
=21.5-0.568
=20.932
35.8*1.2-5.8*1.2=?2.84*(8.5-1.2)=?12.5*32*0.25=?简便方法
2.8*(1.2/0.3-0.58)+15.8*0.28=?简便方法
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