口算.0.9+0.4= 9﹣0.7= 0.36+0.54= 1﹣0.26=3.6+0.4= 1.29﹣0.29= 0.74+0.26= 0.57﹣0.5=2.8+1.12= 6.2+1.8= 2.8﹣2.3= 1.3﹣0.6=
5.6×0.375+×5.4-0.375×0.9
5.6x+4x=17.28
x+=
[一(一)]÷
(+一)×48