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Math K-Plus

How To Add Fractions With Common Denominators And Unlike Denominators

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Learn Fraction Addition With Common Denominators Or Different Denominators



Add Fractions With Common Denominators (Example)


59  +  89  = 


The Denominators Of Both Fractions Are The Same - Add Numerators (5 + 8)

(5 + 8)9  =  139  = 



Converting Improper Fraction To Mixed Number

139  =  149





Add Fractions With Different Denominators


38  +  56  = 


We Must Cross-Multiply Both Fractions To Get A Common Denominator

38  =  3 × 68 × 6  =  1848

56  =  5 × 86 × 8  =  4048


Both Fractions Now Have Common Denominators - Add Numerators (18 + 40)

(18 + 40)48  =  5848  = 

Greatest Common Divisor
5848  =  58 ÷ 248 ÷ 2  =  2924  = 

Converting Improper Fraction To Mixed Number
2924  =  1 524





Recommended reading: Adding Fractions Calculator, How To Subtract Fractions, How To Multiply Fractions, and How To Divide Fractions.