Common Denominators
Re-cut both fraction bars to the same number of parts, and each shaded amount stays exactly the same
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Re-cut both fraction bars to the same number of parts, and each shaded amount stays exactly the same
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Different denominators mean different part sizes, so the fractions can’t be added yet. The fix: re-cut both bars into the same number of parts — that’s finding a common denominator. Amazingly, no matter how fine the cuts, each shaded amount stays the same. Match the denominators, then try to find the smallest one!
Re-cut two fraction bars into more parts until both match — the shaded amount never changes. The smallest match is the least common denominator.