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How to add and subtract fractions | Year 3 Mathematics PDF Download

Common Denominators

  • Adding and subtracting fractions is simpler when the denominators are the same.
  • For instance, These are called the denominators.
    How to add and subtract fractions | Year 3 Mathematics

How to add and subtract fractions | Year 3 Mathematics

Equivalent fractions

However, sometimes the denominators are different.
How to add and subtract fractions | Year 3 MathematicsYou can use equivalent fractions to make them the same.
A common multiple of 2 and 3 is 6.
So, for each fraction we need an equivalent fraction with a denominator of 6.
To find the equivalent fraction for 1/2 we need to multiply the numerator and denominator by 3.
How to add and subtract fractions | Year 3 MathematicsAnd to find the equivalent fraction for 1/3 we must multiply the numerator and denominator by 2.
How to add and subtract fractions | Year 3 MathematicsNow the denominators are the same we can add them together.
How to add and subtract fractions | Year 3 Mathematics

Question for How to add and subtract fractions
Try yourself:
Which of the following is the correct equivalent fraction for 2/5 with a denominator of 10?
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