口算1.6÷0.4= 0.77×1= 7.5÷3= 1.5×6=0.125×8= 31.4÷3.14= 1.4×10= 0.1×6.4=3.6×0.2= 1.5÷1.5= 2.8÷0.4= 2.3+1.8=10÷0.1= 4.16÷1= 0.45×0.1= 0.2×11=3.6÷2= 1.2÷0.02= 72÷0.9= 25×0.4=
直接写出得数.= 45×99= 0.9×99+0.9= = =
巧算下列各题.(×0.11+0.11×)×25 0.375×﹣+6.625×37.5%24×(+﹣) 98.3﹣3.32﹣5.68+10.7.
怎样算简便就怎样算.10÷8+3.96×12.5%+2.04××3.6+×+3.6÷〔(+)×〕859×1.9﹣8.59×80﹣85.9.
怎样算简便就怎样算.8.89×36+8.89×63+8.891﹣1÷2﹣1÷3﹣2007×216×(﹣.
用简便方法计算下面各题.(0.86+0.86+0.86+0.86)×25 4÷1+6×125÷(50÷8) 7.6×÷[1.9﹣1.9×(1.9﹣1.9)].