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

The video tutorial explains how to convert a mixed number into an improper fraction and solve a subtraction problem involving fractions with different denominators. It covers finding the lowest common denominator, converting fractions to have the same denominator, and performing the subtraction to find the final answer.

What is the first step in solving the problem involving mixed numbers?

• Multiply the mixed number by the fraction

• Add the mixed number to the fraction

• Convert the mixed number into an improper fraction

• Convert the mixed number into a decimal

Why is it necessary to find a common denominator when adding or subtracting fractions?

• To convert fractions into mixed numbers

• To make the fractions easier to multiply

• To ensure the fractions have the same numerator

• To perform addition or subtraction accurately

What is the lowest common denominator for the fractions 5/4 and 1/3?

• 15

• 9

• 6

• 12

How do you convert 5/4 into twelfths?

• Multiply both numerator and denominator by 2

• Multiply both numerator and denominator by 3

• Multiply both numerator and denominator by 5

• Multiply both numerator and denominator by 4

What is the result of subtracting 4/12 from 15/12?

• 15/12

• 13/12

• 11/12

• 9/12