7
8
9
10
乐乐
21.4
23.8
25.6
28.2
东东
23.1
25.3
27.2
29.8
205+97= 3.01﹣0.1= 0.25×3×4= 36×25%=
3×a×a= ×1.6= 4÷25%= 16.4+3.06=
1﹣ ÷ = ( ﹣ )÷ =