2.46*0.8+1.23*0.4＝,脱式计算,

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2.46*0.8+1.23*0.4＝,脱式计算,
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2.46*0.8+1.23*0.4＝,脱式计算,
2.46*0.8+1.23*0.4＝,脱式计算,

2.46*0.8+1.23*0.4＝,脱式计算,
2.46*0.8+1.23*0.4
=2.46*0.8+1.23*2*0.2
=2.46*0.8+2.46*0.2
=2.46*(0.8+0.2)
=2.46*1
=2.46