28+4= 37-8= 4×4= 6×6=
53+7= 2×5= 99-9= 6×3=
73-(65-60)= 54-(34 + 6)= 5×4-16= 6×3+20 =
废金属
废纸
废塑料
飞鱼队
15.7
30.4
16
快马队
24
33.1
18.5
= 2.4×5= = 0.32=
= = =