Addition of Like Fractions

To add two or more like fractions we simplify add their numerators. The denominator remains same.

1. Let us find the sum of two fractions 37 and 27.

3 by 7

37 is colored green.


2 by 7

27 is colored yellow.


37 + 27 is represented by 

5 by 7

37 + 27

= 3+27

= 57 = Sum of NumeratorsCommon Denominator

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Addition of Fractions with the Same (Like) Denominator

2. Observe the following figures:

Adding Like Fractions

What do we observe?

In the first figure 14of the circle is shaded and in the second figure 24 of the circle is shaded.

In all, we have Hence 3/4 of the circle is shaded.

14 + 24 = 1+24 = 34

Thus, to add the fractions with the same denominator, we simply add their numerators and write the common denominator.

Sum of the fractions with like denominators = Sum of the NumeratorsCommon Denominator


Solved Examples on Addition of Like Fractions:

1. Find the sum of 19 and 49.

Solution:

Sum of 19 and 49

= 19 + 49

= 1+49

= 59


2. Find the sum of 727 and 927.

Solution:

Sum of 727 and 927

= 727 + 927

= 7+927

= 1627


3. Find the sum of 429, 529 and 829.

Solution:

Sum of 429, 529 and 829.

= 429 + 529 + 829

= 4+5+829

= 1729


More Examples on Addition of Like Fractions:

(Fractions having same denominator)

4. Add 517 + 417

Solution:

517 + 417

= 5+417

= 917  (in lowest terms)


5. Add 323 + 1323 + 423

Solution:

323 + 1323 + 423

= 3+13+423

= 2023  (in lowest terms)

Addition of Like Fractions

Addition of Three Like Fractions Video

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6. Find the sum of 31105, 41105 and 11105.

Solution:

Sum of 31105, 41105 and 11105.

= 31105 + 41105 + 11105.

= 31+41+11105

= 83105


7. Find the sum of 37 and 27

Solution:

37 + 27 = 3+27 = 57


2. Find the sum of 115, 415, 715

Solution:

115 + 415 + 715 = 1+4+715 = 1215


Worksheet on Addition of Like Fractions:

1. Add the following Like Fractions:

(i) 25 + 35

(ii) 18 + 38 + 78

(iii) 1123 + 1023 + 523

(iv) 210 + 110 + 310

(v) 511 + 711 + 411 + 211


Answer:

1. (i) 1

(ii) 138

(iii) 1323 

(iv) 35 

(v) 1711 


2. Find the sum:

(i) 19 + 49

(ii) 14 + 24

(iii) 521 + 821

(iv) 415 + 715

(v) 716 + 816

(vi) 1319 + 219


Answer:

2. (i) 59

(ii) 34

(iii) 1321

(iv) 1115

(v) 1516

(vi) 1519


3. Using the figures, fill in the blanks:

(i)

Like Fraction Addition




     1828+88

(ii)

Add 2 Like Fractions




     1525+55

(iii)

Addition of 2 Like Fraction



     182828++88

(iv)



Addition of Two Like Fraction




     2747+77

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