KS2 Primary Maths Age 13-17 - Fractions, Decimals and Percentages: Adding and Subtracting Fractions - Explained

The video tutorial explains how to determine the unshaded fraction of a circle when given shaded portions. It demonstrates a method of adding fractions by finding a common denominator, specifically converting fractions to twelfths. The tutorial also discusses an alternative method of subtracting the sum of shaded fractions from one. The lesson concludes with a summary of the solution and a brief mention of the next paper.

What fractions of the circle are initially shaded?

• 1/3 and 1/5

• 1/2 and 1/8

• 1/5 and 1/7

• 1/4 and 1/6

What is the least common denominator for the fractions 1/4 and 1/6?

• 14

• 10

• 8

• 12

How many twelfths is 1/4 equivalent to?

• 2/12

• 5/12

• 3/12

• 4/12

What is the total shaded fraction of the circle when converted to twelfths?

• 6/12

• 8/12

• 5/12

• 7/12

What is the alternative method to find the unshaded fraction of the circle?

• Divide the shaded fraction by 2

• Add the shaded fractions again

• Subtract the shaded fraction from 1

• Multiply the shaded fractions