Math Antics
Adding & Subtracting Fractions
Find common denominators, then combine — the same process works with negatives.
Watch on YouTubeApply the sign rules to fractions and decimals, not just whole numbers.
Read this first — it covers the idea in plain language with a worked example.
Negative fractions and decimals follow the same sign rules as integers. First handle the sign, then do the arithmetic you already know.
Compute -3/4 + 1/2.
Watch out
A negative fraction can be written three equal ways: -3/4 = (-3)/4 = 3/(-4). Don't let the placement of the sign confuse you.
A short video that walks through this topic.
Find common denominators, then combine — the same process works with negatives.
Watch on YouTubeTry a worksheet or work through some problems before the quiz.
A couple of questions to make sure this topic stuck. Retake as many times as you want.
Operations with Rational Numbers
What is -1/3 + 1/3?