Adding fractions with different denominators by first finding a common denominator.
Where your child meets this in real life: Combining different fractional quantities (½ + ¼ cups of flour)
SEAGReady breaks add fractions (different denominators) into 3 steps, taught in order so each skill builds on the last.
excluded lesson — excluded from official-format mocks
Add fractions where one denominator is a multiple of the other (e.g., 1/2 + 1/4)
excluded lesson — excluded from official-format mocks
Add fractions where neither denominator is a multiple of the other by finding a common denominator (e.g., 2/3 + 1/4)
excluded lesson — excluded from official-format mocks
Add fractions and simplify results or convert improper fractions to mixed numbers (e.g., 2/3 + 3/4 = 1 5/12)
Three free sample questions from our add fractions (different denominators) course. Every question comes with a full explanation, and hints that guide without giving the answer away.
This is the exact interactive worked example your child sees in SEAGReady. Step through it and watch the method build up.
Ruby is making orange squash. She uses ½ of a jug of water and then adds another ¼ of a jug.
How much water did she use altogether?
½ + ¼
The denominators are 2 and 4
Step 1 of 5
Ruby is making orange squash. She uses ½ of a jug of water and then adds another ¼ of a jug.
How much water did she use altogether?
Ruby used ¾ of a jug of water altogether.
The key insight: When one denominator divides into the other, you only need to convert one fraction!
Common mix-up: ½ + ¼ = ²⁄₆. Adding numerators AND denominators separately doesn't work - the pieces are different sizes.
These are the misconceptions we see most often in add fractions (different denominators), including the ones our practice questions are specifically designed to catch.
Struggling with add fractions (different denominators)? The real gap is often in one of these earlier topics.
SEAGReady finds the exact step where your child gets stuck, teaches it with worked examples like the one above, and brings it back for review so it sticks.
Free to start · no card needed