= 90÷90%= =
= = 80×30%=
1÷1%= 4.5÷0.09=
× = 4÷0.8= 3﹣ = 0.23=
÷ = 786﹣298= 25×0.7×4= 8.7+7=
( ﹣0.375)÷ = × ÷ × =
每块方砖的边长/m
0.2
0.3
0.4
0.6
……
每块方砖的面积/m2
0.09
0.16
所需方砖的数量/块
360
90