Cross Multiplying

Wala: Multiplying and dividing.

L.O: Multiply and divide fractions, cross multiply, and use reciprocal fractions.

The Big Question.

Should we always split things equally, or is it sometimes fair to give more to one person? How does this relate to dividing fractions?

​There 3 pizzas divided into 6 pieces each. How will 6 people share the pizzas and how many pieces will each person get?

STARTER

Key Points:

- Fractions can be multiplied by multiplying the numerators and denominators.
- Fractions can be divided by multiplying the first fraction by the reciprocal of the second fraction.
- Cross multiplication is a method used to compare two fractions.
- The reciprocal of a fraction is obtained by flipping the numerator and denominator.

​​Station 1

​​Station 2

​​Station 3

​​Station 1

​​Station 2

​​Station 3

​ What is 1/2 x 1/4?

What is 2/3 x 1/3?

What is 2/4 ÷ 2/3?

What is 1/5 ÷ 1/2?

​​Station 1

What is 3/4 x 2/5?

What is 2/3 ÷ 4/5?

What is 1/2 x 3/4 x 1/3?

What is 5/6 ÷ 2/3?

​​Station 2

​What is 2/3 x 4/5 x 3/4?

What is 3/4 ÷ 5/6?

What is 2/3 x 1/2 ÷ 3/4?

What is 3/4 x 5/6 ÷ 2/3?

​​Station 3