口算两位数加减乘除

33-3=3076-57=1984-16=6853-2=5168-27=41 70-62=887-27=6062-59=365-60=589-17=72 53-30=2323-1=2250-6=4477-23=5429-2=27 86-81=558-54=496-3=9350-4=4684-80=4 69-1=6884-74=1079-51=285-2=357-51=6 90-57=3363-31=3238-19=1984-62=2220-10=10

33-376-5784-1653-268-27 70-6287-2762-5965-6089-17 53-3023-150-677-2329-2 86-8158-5496-350-484-80 69-184-7479-515-257-51 90-5763-3138-1984-6220-10