两位数加减法练习题4000道(直接打印)

70–58= 97–19= 70–48= 90–18= 18+68=98–29= 41–23= 71–45= 17+

腾讯文库两位数加减法练习题4000道(直接打印)两位数加减法练习题4000道(直接打印)