🔢 Different Denominators
🟰 Same Denominator
➕ Addition — Different Denominators
💡 Find the LCM of all three denominators, rewrite each numerator over
it, then add.
➖ Subtraction — Different Denominators
💡 Find the LCM of all three denominators, rewrite each numerator over
it, then subtract.
➕ Addition — Same Denominator
💡 Same denominator — add all three numerators, keep denominator
unchanged, then factorise and simplify.
➖ Subtraction — Same Denominator
💡 Same denominator — subtract all three numerators, keep denominator
unchanged, then factorise and simplify.