填空⑴5+( )=14 ⑵4+( )=12 ⑶3+( )=12 ⑷14-5="(" ) ⑸12-4="(" ) ⑹12-3="(" )
= /12=7/ = %
3÷5= = %= :40.
= ÷40=0.4= %= 成.
= ÷18=87: .
8÷ = :28=0.25= %= 成.