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Arithmetic & fractions

Set up an arithmetic session and add fractions with different denominators — finding a common denominator, converting, adding and simplifying, then practising.

6 min read Students · Parents · Educators Video in 1 language
2:06 · narrated · captions

Set up an arithmetic session

  1. Open the Setup Wizard

    In the tutor lobby, choose Setup Wizard at the top (or Customize). The wizard builds a focused session in four quick steps.

  2. Pick your level — Build on Basics

    Build on Basics revisits foundations, Advanced (recommended) works at grade level, and Expert moves faster with harder problems. Then press Continue.

  3. Choose how you learn — Step-by-step

    Direct gets to the point, Step-by-step explains every move, In-depth adds the why behind each idea, and Guide me teaches through questions.

  4. Choose Math, then the focus area — Arithmetic

    Select Math. A Focus area in Math row appears (General Math, Arithmetic, Algebra, Geometry, Trigonometry, Pre-Calculus, Calculus, Statistics, Probability and more). Picking one keeps every explanation, example and practice question on that topic.

  5. Pick a buddy and start

    Choose a learning buddy — Sage is calm and methodical, a favourite for math — then press Start Session.

Add two fractions, step by step

2/3 + 3/4Grades 4–6
  1. Common denominatorLCD(3, 4) = 12The smallest number both 3 and 4 divide into.
  2. Convert2/3 = 8/12, 3/4 = 9/12Multiply top and bottom by the same number (×4 and ×3).
  3. Add tops8/12 + 9/12 = 17/12Same-sized pieces can now be added.
  4. Mixed number17/12 = 1 5/1212 twelfths make one whole, with 5 twelfths left.
Answer: 17/12 = 1 5/12
Check: 17/12 ≈ 1.417 and 2/3 + 3/4 ≈ 0.667 + 0.75 = 1.417 ✓

  1. Ask your question

    Type the sum and ask for steps. Write fractions with a slash: 2/3.

    Try it“What is 2/3 + 3/4? Please go step by step.”

  2. Convert to twelfths

    Find the least common denominator (12) and rewrite each fraction. Send your conversion — the tutor checks it.

    Try it“So 2/3 = 8/12 and 3/4 = 9/12?”

  3. Practise with a fresh problem

    Tap Give me one practice question for a new problem at the same level. Solve it, send your answer, and get instant feedback.

Keep learning

Math topics

Word problems

Turn words into math with the Guide me style: pick out what you know, ask for a hint when you're stuck, and solve a money problem from start to finish.

Ways to learn

Quick actions: simpler, different method, example, quiz

Every answer comes with one-tap buttons. Learn what each does — Give me an example, Try different approach, Explain simpler, Quiz me, practice, Summarize, Copy, Read aloud and Try again.

By grade

Elementary math (K–5)

How the tutor teaches younger learners: a simpler Choose a Mission lobby, everyday examples, pictures, and lots of encouragement — shown with a real fractions question.

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