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Fractions.

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Presentation on theme: "Fractions."— Presentation transcript:

1 Fractions

2 5 1 5 1 Metre is divided into ( ) equal parts,
each part is of 1 Metre. 5 1 5

3 1 Metre is divided into ( ) equal parts, ( ) parts is of 1 Metre.
( ) m 1 m 1 m m m 1 m 1 m m m =1 m

4 Here is a set of 10 apples. The set of apples is divided into ( ) equal groups. ( ) out of ( ) groups of apples is circled. of the apples are circled. 5 5 are

5 1、What is the fraction of each coloured part in the figures below?
2、Colour the figures according to the following fractions?

6 3、Circle the figures according to the following
fractions?

7 1 1 2 1 2 1 3 1 3 1 3 1 4 1 4 1 4 1 4 1 5 1 5 1 5 1 5 1 5 Fraction Wall 1 6 1 6 1 6 1 6 1 6 1 6 1 7 16 8 9 10 12

8 1 1 2 1 3 1 4 1 5 1 6 1 7 1 8 1 9 1 10 1 12 1 16

9 The bigger the numerator, the bigger the fraction.
We can compare fractions with the same denominator. Regular pattern: The bigger the numerator, the bigger the fraction.

10 Compare the following fractions.
1

11 Challenge True or False? m F =

12 Summary 2、If Denominator = Numerator in fraction, the fraction = 1.
1、1 Whole is divided into ( ) equal parts, ( ) parts is of 1 whole. ( ) 2、If Denominator = Numerator in fraction, the fraction = 1. 3、Compare fractions with the same denominator: The bigger the numerator, the bigger the fraction.

13 Fraction Wall 1 each part is smaller. 1 2 1 2 1 3 1 3 1 3 1 4 1 4 1 4
If we divided into more equal parts, each part is smaller. 1 2 1 2 1 3 1 3 1 3 1 4 1 4 1 4 1 4 1 5 1 5 1 5 1 5 1 5 Fraction Wall 1 6 1 6 1 6 1 6 1 6 1 6 1 7 16 8 9 10 12

14 1 2 1 3 1 4 1 5 1 6 1 7 When numerator is 1, The bigger demominator, The smaller fraction. 1 8 1 9 1 10 1 12 1 16 1 2 16 3 4 5 6 7 8 9 10 12

15 Fill in blanks: > > > 2 3 6 1 3 2 1 2 6 1 3 6
3 apples is of the box. 2 apples is of the box. 1 apples is of the box. 2 3 6 1 3 2 1 2 6 1 3 6 > > >

16 Think and ratiocinate Look and compare 2 5 6 1 5 1 5 1 6 2 6 8 1 8 2 8 12 ∵ , ∴ 2 s s , So 。 1 5 6 2 When numerator is 2, The bigger demominator, The smaller fraction. 1 12 2 5 6 8 12

17 3 4 7 4 7 9 7 9 16 1 4 1 7 1 9 分子相同的分数,分母越大,分数就越小。 分母越小,分数就越大。 1 16
分子相同的分数,怎样比较大小? 1 7 1 9 分子相同的分数,分母越大,分数就越小。 分母越小,分数就越大。 1 16

18 3 8 4 5 6 7 12 16 1 5 3 20 19 5 17 10 16 13 9 40 30

19

20 比大小 2 7 2 9 3 7 2 7 9 3


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