Unit seven Specimen preparation - intratable division (制作标本——表内除法) Lesson one I picked eight flowers, two of each. How many flowers did you pick? 我采了8朵花，每种2朵。采了几种花？ 2. So if we want to know how many flowers we pick, we want to know how many 2's are in the 8. 求采了几种花，就是求8里面有几个2。 3. Eight divided by two equals four 8÷2=4 4. We can use the multiplication formula. Multiply 2 by what to get 8? Concerning eight 可以用乘法口诀算。2和几相乘得8？二四得八 5. What other questions can you ask? 你还能提出什么问题？ 6. There are several butterflies in each cage? 每个笼子里面有几只蝴蝶？ 7. If you want to figure out how many butterflies there are in each cage, you divide 15 equally into 3 parts and you want to figure out how many butterflies each is. 求每个笼子里有几只蝴蝶，就是把15平均分成3份，求每份是多少。 8. Fifteen divided by three equals five 15÷3=（ 5 ） 9. You can do it using the multiplication formula. 可以用乘法口诀计算。 10. I could also write it vertically. 还可以写成竖式。 11. Let's practice! 我们来练习一下吧！ Lesson two 1. How many specimens can forty-two flowers make? 42朵花能做几件标本？ 2. Forty-two divided by six equals seven 42÷6=（ 7 ） 3.Which formula can be used to calculate it? 可以用哪句口诀计算？ 4. Six seven forty-two 六七四十二 5.What other questions can you ask? 你还能提出什么问题？ 6. How many specimens can fifty-six leaves do? How about seventy-two? 56片树叶可以做几件标本？72片呢？ 7. You solve the problem! 你来解决问题吧！ 8. Let's practice! 我们来练习一下吧！ Lesson three 1. Li Fei picked up several times as many shells as Wang Ding? 李飞拾的贝壳数是王丁的几倍？ 2. There are two threes in six. Six is twice three. 6里面有2个3,6是3的2倍。 3. What other questions can you ask? 你还能提出什么问题？ 4. Liu Lin picked up several times as many shells as Wang Jing? 刘林拾的贝壳数是王晶的几倍？ 5. Let's go around and around with the tools. 我们用学具摆一摆，圈一圈吧。 6. I see that there are two 4's in 8, and 8 is twice 4, so I can divide it. 我发现8里面有2个4，8是4的2倍，可以用除法计算。 7. The number of shells picked up by Lin Jie is several times that of Li Fei? 林杰拾的贝壳数是李飞的几倍？ 8. What to think? 该怎样想呢？ 9. Let's practice! 我们来练习一下吧！ Lesson four 1. How many eggs are there? 一共有多少个鸡蛋？ 2. Two times three times four is twenty-four 2×3×4=24 3. You will calculate that 36 divided by six divided by two equals three. 你会计算36÷6÷2=（3） 4. Divide 2 boxes of eggs evenly among 4 boxes. How many eggs are in each box? 把2盒鸡蛋平均分装在4个盒子里，每个盒子里装几个鸡蛋？ 5. Can you calculate fifteen divided by three times five? 你会计算15÷3×5吗？ 6. Let's practice! 我们来练习一下吧！ Lesson five 1. Use at least one fruit, and a maximum of three, to make a fruit bowl with apples, bananas and strawberries. 用苹果、香蕉和草莓三种水果做果盘，至少用一种水果，最多用三种水果。 2. How many kinds of fruit bowls can you make? 一共可以做多少种果盘？ 3. Only use one fruit. 只用一种水果。 4. Use two kinds of fruit. 用两种水果。 5. Use three kinds of fruit. 用三种水果。 6. Think about lists. 可以列表思考。 7. I have found that this way of categorizing answers can be found without repetition or omission. 我发现这样分类列举，能不重复、不遗漏地找到答案。 8. Let's practice! 我们来练习一下吧！ |
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