1.25×32×0.25
× +15×0.375+0.4×37.5%
÷ ×(1﹣ )
0.4÷0.2= 1÷= 406﹣299= a﹣a×0=
9.5×+0.5× 9.6-11÷7-×3
1.25×4×0.8×0.25 3.28×37+6.4×32.8﹣328×1%
78÷[50﹣(50﹣39)] ×25%-÷4 7-÷2-
++12.5% (+)×17×15 2.25×4.8+77.5×0.48