题目

连词成句。 1. at, do, what, you, do, home (?) _______________________________ 2. I, help, often, parents, my (.) _________________________________3. my, makes, mother, bed, the (.) _______________________________ 4. plants, water, she, the (.)_______________________________ 5. Her, irons, mother, clothes, the (.)_______________________________ 答案：【答案】1. What do you do at home? 2. I often help my parents. 3. My mother makes the bed. 4. She waters the plants. 5. Her mother irons the clothes. 【解析】略17．列式计算．（1）被减数是789，减数是467，两数的差是多少？（2）一个数是508，另一个数是6，积是多少？（3）差和减数都是42，被减数是多少？