(元)
0.2×45= 3﹣= 10×25%= 32×0×3.08=
+= 0.5+= = (120﹣70)÷=
1.85﹣+= 1÷×= +0.375=
2.4﹣= (+)×2.4= 5÷×5÷=
10×45%= 1.25×8= 40×(1﹣20%)=