(7.2-3.15)÷0.6×1.396.5×43.5+43.5×28.5-25×43.5
×=÷3=÷=-= 3÷15=+0.25= 1÷= 85%-15%= 10÷10%= 5×÷5×=
脱式计算下面各题。 4÷-0.6×÷ (+)÷÷[1÷(-)]
÷+×
20×(+)