一点46乘5加12.8除以0.4乘7.5
=1.46*5+12.8÷0.4*7.5
=1.46*5+32*1.5*5
=（1.46+48）*5
=（50-0.54）*5
=250-2.7
=247.3
一点46乘5加12.8除以0.4乘7.5等于多少用简便方法计算.
一点46乘5加12.8除以0.4乘7.5
=1.46*5+12.8÷0.4*7.5
=1.46*5+32*1.5*5
=（1.46+48）*5
=（50-0.54）*5
=250-2.7
=247.3