口算 320÷40﹦ 96÷16﹦ 32÷2﹦ 12×5﹦ 36÷18﹦4×23﹦ 85÷5﹦ 14×6﹦ 64÷16﹦
用简便方法计算下面各题.43.6+9.8+6.4 17.3×0.25×8 2.31×1.5+1.5×7.69.
怎样简便就怎样算.4.3+0.98+0.7= 5.27﹣3.9﹣0.1= 8.44﹣(5.44+2.8)= 4.9+0.1﹣4.9+0.1=
= = = =
用合适的方法计算下面各题.(﹣)×100 ×+× ×+÷(12×﹣7.3)÷ ÷〔(+)×〕 (×27﹣)×.
怎样简便就怎样算÷+× ×+× 12×(75%+) 20÷÷.