×4.2= 10.4﹣0.8= 44÷ = 0.11÷0.1=
÷ = 8.7÷29= × = 6×( ﹣ )=
2÷24= ×= 16×40%=
112= 51×99≈ 3.5×2÷3.5×5=
①8.06+12.34×0.6
②12-4.83+2.17
③
④4.8÷[(8.4÷7-0.6)×0.2]