吴婷去年重X千克,今年比去年重2.5千克,今年重 千克.
7÷13的商用分数表示是: .
: =0.125=3÷ = :16.
18÷ == :75= %= 折.
14÷ =0.35= :60= %= : .
÷ == (填小数)== ÷24.