Today I’m going to show you a little trick for adding fractions with different denominators or unlike denominators.
✔ More fractions videos:    • Fractions  

To add fractions with different denominators, first, you need to cross multiply. Start by multiplying the first numerator with the second denominator. Then, multiply the first denominator with the second numerator and add these 2 products together to get the numerator of the resulting fractions. Finally, multiply the denominators to get the denominator of the resulting fraction.

And that’s it! Simply the resulting fraction if it’s necessary. See you next lessons.

References:
Dorling Kindersley Limited (2016). How to be good at math (p. 52).
Fandiño, M. (2009). Las fracciones aspectos conceptuales y didácticos (p. 146). Magisterio.

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