题目内容
80
80 72 ____ ____ ____ ____ ____ ____ ____
填一填
80连续减8，写出每次减得的差．
60连续减5，写出每次减得的差．
60：55 ________ ________ ________ ________ ________
算一算．
80连续减去8，写出每次减得的差．
80，72，________，________，________，________．________，________．
