括号里最大能填几?30× <220 40× <140 60× <20024× <250 35× <235 36× <280.
15: ==36÷ = %
0.6== : = ÷ .
12÷ ==0.375= :24.
0.75= %= ÷ = 折.
÷8==0.25= %= : .