Module 4 · Fractions · Lesson 19 of 39

Operations with mixed numbers

Add, subtract, multiply and divide mixed numbers.

In this lesson · about 16 minutes

  • Add and subtract mixed numbers
  • Multiply and divide mixed numbers by converting first

Adding and subtracting: you can add the whole numbers and the fractions separately, or turn both into improper fractions first. Converting always works, even when you'd need to "borrow".

Multiplying and dividing: always convert to improper fractions first. Multiplying the whole parts and fraction parts separately gives the wrong answer.

Worked example

Find 6 3/7 − 2 1/4

Subtract the whole numbers and the fractions separately.

    Step 0 of 3

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    Worked example

    Find 2 2/3 × 5 3/4

    Convert to improper fractions, then multiply.

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      Practice sets mastered: 0 of 2

      Tip: master each practice set first (get 5 right in a row).

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