The use of methods for common fractions

1.

student: Zhanai G. T.

2.

3.

To look for historical data
homework
The purpose
conclusion
Independent work
Addition of
common
fractoins
Subtraction
of common
fractions

4.

The numerator of a fraction may be less than the denominator
may be equal to the denominator, and could be larger than the
denominator.
Example:
2 4 3 7
; ; ;
3 9 10 8
- proper fraction, because 2<3, 4<9, 3<10
therefore, proper fraction less than unity.
2
4
3
7
1; 1; 1; 1
3
9
10
8

5.

Example :
5 11 12 23 45
; ; ; ;
5 6 8 12 45
proper
fraction,
Because, 5=5; 11>6; 12>8; 23>12; 45=45
5
11
12
23
45
1; 1; 1; 1; 1
5
6
8
12
45

6. orally

№1. which one is the proper fraction, and
what is improper fraction.
1 8 8 3
5 56 15 30 9
; ; ;
;
;
;
;
;
6 3 8 10 11 56 6
8
25
№2. 4:5; 6:5; 1:3; 9:2; 12:7; 3:5; read the division
as a fraction.
4 1 3
Answer:
; ;
5 3 5
6 9 12
; ;
5 2 7
proper fraction,
improper fraction

7. Addition and subtraction mixed number

1)
1
1
1
8 5 3
5
6
5
1
2
3
8 1 3
8
3
4
2)
3)
7
3
11
1
5
3 8 9 5
6 2 6
10
4
12
4
7
14
3 2
9 1
4 5
7
3
11
12 9 5
15
4
12 2
1
3
5 2 1
3
4 5
3
7
3
1
6 2 8 1
5
15
4
60
5
3
1
5 8 6
8
4
5