+ = 60× = 1.6÷0.2= 3.14×22 = 8÷ ×3=
45×50%= × = 48÷ = ÷ = ×0.2÷ ×0.2=
100%,0.9,【填百分数】,【填分数】,【填折扣】。
把a、b、c按顺序排列:<<
A.3.14 B.6.28 C.9.42 D.无法确定