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Grade 4 - Mathematics
8.17 Adding and Subtracting Fractions Like Denominators
Look at the denominators of the fractions.
If the denominators are same then they are like fractions.
While adding or subtracting two like fractions, the numerators are added or subtracted and the common denominator is written.
Example
: 1/5 + 3/5
Since the denominators are same,just add the numerators .
Answer: 4/5
Example
: 3/12 - 1/12
Since the denominators are same,just subtract the numerators.
Answer: 2/12
Directions:
Add or subtract the following. Also write at least ten examples of your own.
Q 1
: 1/16 + 4/16 =
5/32
5/16
16/5
Q 2
: 5/16 - 3/16 =
16/2
2/16
2/0
Q 3
: 7/8 - 3/8 =
4/0
8/4
4/8
Q 4
: 7/17 - 4/17 =
3/0
17/3
3/17
Q 5
: 2/5 + 2/5 =
4/5
5/4
4/10
Q 6
: 6/13 + 5/13 =
11/26
11/13
13/11
Q 7
: 5/25 - 2/25 =
3/25
3/0
25/3
Q 8
: 8/10 - 5/10 =
3/10
3/0
10/3
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