7
8
9
10
欢欢
22.7
24.6
27.5
29.8
乐乐
23.5
24.4
27.1
28.8
× = 4÷0.8= 3﹣ = 0.23=
÷ = 786﹣298= 25×0.7×4= 8.7+7=
( ﹣0.375)÷ = × ÷ × =