Reply To: Week 3 Video Lessons

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Fabio Zanatta


I need a clarification on the lesson 9.

Into the part “Adding/ Subtracting fractions” I can see:


In that case I can obtain 19 with cross multiplication: 3×3+5×2=19. The number 2 is 4/2 and 3 is 6/2 (where 4 and 6 are denominators of the fractions): why you can divide 4 and 6 by 2? It’s because 2 is common by two numbers?



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