爷爷有80个鸭蛋，上午买了36个，下午买了28个。'j4{2j8F0K9S4t,[,|
（1）还剩多少个鸭蛋？'j4{2j8F0K9S4t,[,|
算式：提示1M8i7^(w'j4{2j8F0K9S4t,[,|
答：还剩)i:i-h2Y+Z/@-c;R'H7P个鸭蛋。'j4{2j8F0K9S4t,[,|
（2）有人要买20个鸭蛋，还够吗？不够的话，差几个？'j4{2j8F0K9S4t,[,|
算式：提示*u5H+U6|'j4{2j8F0K9S4t,[,|
答：9\4U/F'u5B够，差9y)F'B+w-C.N;X个。'j4{2j8F0K9S4t,[,|