AI generatedNumberKey Stage 3

Finding a missing fraction in a sum

A missing addend is the total minus the known addend.

  • A missing addend is the total minus the known addend.
  • Use equivalent fractions with the same denominator to do the subtraction.
  • Check by adding the missing fraction back to the known fraction.

Example 1

Find the missing fraction.

Undo the known part using subtraction.Use a common denominator.

Example 2

Find the missing fraction.

Undo the known part using subtraction.Use a common denominator.

Remember
Use the worked steps to check your method, not just the final answer.

Your turn

Question 1

Find the missing fraction.

Check answer
Undo the known part using subtraction.Use a common denominator.

Substitute the result into the original equation to check it.

Question 2

Find the missing fraction.

Check answer
Undo the known part using subtraction.Use a common denominator.

Substitute the result into the original equation to check it.

Question 3

Find the missing fraction.

Check answer
Undo the known part using subtraction.Use a common denominator.

Substitute the result into the original equation to check it.

Question 4

Find the missing fraction.

Check answer
Undo the known part using subtraction.Use a common denominator.

Substitute the result into the original equation to check it.

Question 5

Find the missing fraction.

Check answer
Undo the known part using subtraction.Use a common denominator.

Substitute the result into the original equation to check it.

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