1. Lesson 2
Unit fraction (1)

2. Reflection of homework
To find the relationship of the whole and part at home and say to your parents.
Say: If …….. is the whole, then ……. is
the part of the whole.

3. Review 1、Understand the whole and part and the relationship with them.
2、Divide the whole into several equal parts Divide equally.

4. 111×111＝
12321
1111×1111＝
11111×11111＝ 25 ＝ ＝ 36 ＝ 81

6. Divided equally or not

7. Divided equally or not

8. Divided equally or not

9. One day Jone and I got 4 cakes
One day Jone and I got 4 cakes. Jone said: ”I want to share them with you, so I get 3 cakes”
Is it right?
Can you divided equally? 2
Each gets ( ) cakes.

10. 1 The second day Jone and I have got 2 cakes. Can you divided equally?
Each one gets ( ) cake.

11. half The third day Jone and I got 1 cake. Can you divided equally?
We each get ( ) cake.

12. 1 3 1 3 1 2 1 2 1 3 1 4 1 4 1 4 1 4

13. 1 2 How to write fractions： Numerator Fraction line Denominator
1st Fraction line
2nd Denominator
3rd Numerator
are all fractions. 1
Numerator
Fraction line 2
Denominator

14. １ － ２
Is it right？

15. １ － ２ half half We divide a whole into 2 equal parts,
each part is of the whole,written as

16. 3 1 ( ) － 3 We divide 1 cake into ( ) equal parts,
each part is of the cake . 3 1
( ) － 3

17. 1 m ?

18. Lesson 2 Exercises
2. Match the picture with the fraction. 1 1 1 4 2 6

19. × × √ √ √ √ √ √ Lesson 2 Exercises
1. True or false: Is it divided equally? (“√”or “×”) × × √ √ √ √ √ √

20. Lesson 2 Exercises
3. Write down the fraction of the coloured part 1 6 1 4 1 3 1 5 1 4 1 4 1 4

21. Lesson 2 Exercises 1 4 1 4

22. Lesson 2 Exercises 1 4 1 4 1 4

23. Lesson 2 Exercises
4. True or false.
(1) A rectangular piece of paper is divided into 7
parts of the same size, each part is ( )
(2) Give a cake to 4 children, everyone get of the cake. ( )
(3) means that a whole average is divided
into 5 parts, each part is of the whole.( ) 1 7 √ 1 4 × 1 5 √ 1 5

24. 〉 〉 〉 Lesson 2 Exercises m( ) m m( ) m m( ) m 1 4 1 6 1 10 1 5 1 5 1

25. A fraction, if its numerate is 1, the fraction is also called unit fraction.2 3 7 12 25
100 ……

26. Make

27. 返回

28. 返回

29. 返回

30. ☆☆☆ 3、Chanllege: Ture or false
Revision & Exercises
☆☆☆ 3、Chanllege: Ture or false
Whether the colored part express of the whole? ( )

31. challenge
( )

32. ( ) 1 4

33. challenge
( )

34. 1 8
( )

35. challenge
( )

36. 1 8
( )

37. challenge
( )

38. ( ) 1 16