1. Fractions(5)
LO: Compare the value
of unit fraction

2. Review Unit fractions Numerator Fraction line Denominator
If the whole is divided into( ) equal
parts, then each part is ( ) of the whole. 4 5 3 2 1 — 4 3 1 1 — 5 1 — 2

3. Compare Which one is bigger?

4. 1 — 2 1 — 4
<

5. 1 — 2 1 — 4
>

6. 1 — 4 = 1 — 2

7. Different sizes of the whole
Why?
Different sizes of the whole 1 — 2 1 — 4
> 1 — 2 1 — 4
< 1 — 4 = 1 — 2

8. the same whole 2 1 3 1
> 4 1 6 1
>
>

9. 3 1 3 1 Meter meter meter meter
1 Metre is divided into ( ) equal parts,
each part is of 1 Metre. 3 1 3

10. Q1: Which is the longest? Which is the shortest?
The Same Whole
1 meter
( ) meter
( ) meter 1 6 —
( ) meter
( ) meter
Q1: Which is the longest? Which is the shortest?
Q2:Can you compare these unit fractions with “>”?

11. more equal parts you divide,
Conclusion
For the same whole, the
more equal parts you divide,
the less each part you get. 　　　　 1 _ 1
1　　　　　　　　　　 — 4 —— —— 8 8 4
(less)
(more)
Denominator
Numerator

12. In unit fractions, if the
Conclusion
In unit fractions, if the
denominator is bigger, then the value of the unit fraction is smaller. 　　　　 1 1 _
1　　　　　　　　　　 — 4 —— —— 8 8 4

13. Exercise1: Write down the fractions according to the pictures, then compare the value of them with the sign of “＞”、“＜”or “＝”

14. Compare them and link with “>” :
Exercise2: If I use “1”to express a whole, estimate the colored part and write down the fraction. 1 1 — 2 1 — 3 1 6 —
Compare them and link with “>” :

15. Exercise3: Compare the value of the fractions.

16. Challenge1: If , then what number can you choose to fill in ( )
Challenge1: If , then what number can you choose to fill in ( )? Discuss with your partners.

17. Why have we used different fractions to express the same pink square？
Challenge2: Use fractions to express the pink square. 1 — 2 1 1 — 4 1 — 6 1 — 3
Thinking:
Why have we used different fractions to express the same pink square？

18. 1 4 1 6 Challenge3: The colored part is of the rectangle A.
The colored part is of the rectangle B. 4 1 6
Rectangle A
Rectangle B