39.2✖️5.4-2.6✖️2.5+417✖️0.46
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39.2×5.4-2.6×2.5+417×0.46
=392×0.54+(392+25)×0.46-2.6×2.5
=392×(0.54+0.46)+2.5×(4.6-2.6)
=392×1+2.5×2
=392+5
=397
=392×0.54+(392+25)×0.46-2.6×2.5
=392×(0.54+0.46)+2.5×(4.6-2.6)
=392×1+2.5×2
=392+5
=397
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