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Adding and subtracting fractions with common denominators

2 videos
2 skills
You've already got 1/4 cups of sugar in the cupboard. Your grandmother's recipe for disgustingly-sweet-fudge-cake calls for 3/4 cups of sugar. How much sugar do you need to borrow from you robot neighbor? Adding and subtracting fractions is key. In this quick tutorial we'll focus on fractions with like denominators. Common Core Standards 4.NF.B.3, 4.NF.B.3a

Adding fractions with like denominators

VIDEO 3:18 minutes
With like denominators, you're basically just adding numerators. That's not too bad, right? Can the resulting fraction be simplified?

Subtracting fractions with like denominators

VIDEO 2:26 minutes
Just like when we added...subtracting fractions is pretty straightforward when the two fractions have like denominators.