LESSON ONE 第一课 A preliminary understanding of multiplication Part one What other questions can you ask? 你还能提出什么问题？ 2.How many flowers are there? 变出了多少朵花？ 3. Use study tools. 用学具摆摆。 4.two、four、six 2、4、6。 5. Add three twos. 3个2相加。 Two plus two plus two 2+2+2= （个） 6. How many lanterns are there? 6.一共有多少个灯笼？ Add five threes. 5个3相加。 Three plus three plus three plus three plus three 3+3+3+3+3= (个) 7. How many fish are there? 一共有多少条鱼？ ___________（条） part two How many gourds are there in all? 一共有多少个宝葫芦？ I can calculate:five plus five plus five plus five plus five 我会算：5+5+5+5+5+5+5+5=40 It's too much trouble to sum eight fives by addition. 求8个5的和用加法计算太麻烦了。 If 8 5's are added together, the addendum is the same, so it is easier to write the multiplication formula. 8个5相加，加数相同，写成乘法算式比较简便。 It can also be written as: 也可以写成： Five times eight is forty is read as: five times eight is forty. Eight times five is forty is read as: Eight times five is forty. 5 × 8 = 40 读作：5乘8等于40。 8 × 5 = 40 读作：8乘5等于40。 How many birds are there? 一共有多少只鸟？ Addition:four plus four plus four plus four 加法算式：4+4+4= （只） Write it as multiplication: 写成乘法算式： × ＝ （只） or 或 × ＝ （只） part three What questions can you ask? 你能提出什么问题？ How many ducks were in the original three hats? 原来三顶帽子里一共有几只鸭子？ One plus one plus one 1+1+1=（ ）（只） （ ）×（ ）=（ ）（只） Now how many pigeons are there in the three hats? 现在三顶帽子里一共有多少只鸽子？ Zero plus zero plus zero 0+0+0=( )(只) （ ）×（ ）=（ ）（只） What did you find? 你发现了什么？ |
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