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Everyday Math Calculator
Everyday arithmetic, reviewed October 2026 — exact for the inputs typed, not a substitute for certified measurement or medical advice.
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The tool adds a/b + c/d over the common denominator b × d, summing numerators as (a·d + c·b) — so 1/2 + 1/3 becomes 5/6 with zero decimal drift. Exactness is the point: floating point would give 0.833333…, while the fraction stays precise for the next step of homework or recipe scaling.
Type both numerators and denominators (non-zero). The sum may not be in lowest terms — 2/4 + 2/4 returns 16/16-style unreduced forms — so finish by dividing top and bottom by their GCD (the GCD/LCM tool finds it): 5/6 is already lowest, but larger sums usually are not.
It adds only — no subtraction, multiplication, or division of fractions — does not auto-reduce to lowest terms, and does not convert the answer to a mixed number; split oversized results by hand.
Addition only — result needs reducing by hand.
It returns the summed fraction; reduce it with the GCD to reach lowest terms.
Yes — that is the point. The tool finds the common denominator for you.
Decimals round (1/3 becomes 0.333…), fractions do not. For exam answers and scaled recipes, exactness avoids compounding rounding error.
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