2.3*12.4-3.4*2.3+2.3 48*0.25 1.6*7.5*1.25简算2.3*12.4-3.4*2.3+2.3 = 48*0.25 = 1.6*7.5*1.25=
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2.3*12.4-3.4*2.3+2.348*0.251.6*7.5*1.25简算2.3*12.4-3.4*2.3+2.3=48*0.25=1.6*7.5*1.25=2.3*12.4-3.4*2.3+
2.3*12.4-3.4*2.3+2.3 48*0.25 1.6*7.5*1.25简算2.3*12.4-3.4*2.3+2.3 = 48*0.25 = 1.6*7.5*1.25=
2.3*12.4-3.4*2.3+2.3 48*0.25 1.6*7.5*1.25
简算
2.3*12.4-3.4*2.3+2.3 = 48*0.25 = 1.6*7.5*1.25=
2.3*12.4-3.4*2.3+2.3 48*0.25 1.6*7.5*1.25简算2.3*12.4-3.4*2.3+2.3 = 48*0.25 = 1.6*7.5*1.25=
2.3*12.4-3.4*2.3+2.3
=2.3*（12.4-3.4+1）
=2.3*10
=23
48*0.25
=48*1/4
=12
1.6*7.5*1.25
=1.6*5/4*15/2
=8/5*5/4*15/2
=2*15/2
=15
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