326÷57的商是______位数,试商时可以把57看作__________来试商,这时商可能会偏________.
÷8=3: =25%= 填小数.
0.75=3: =9÷ = %.
3÷ = :10==0.6.
= :20=75%
÷5.6=2÷ ==28: ≈ %.