The reciprocal is the multiplicative inverse of any non-zero number. Any non-zero number multiplied by its reciprocal is equal to 1.

A terminating decimal is one that has a finite number of digits after the decimal point..  E.g. 92.2, 193.3894, non-example:  $$1.\dot9$$.

Expressing one number as a fraction of another

Maths

The multiplicative relationship is extended in the future unit by considering percentages and the connections between multiplicative relationships and direct proportion. By building on a secure understanding of fractions and ratio, pupils can see their understanding of multiplicative relationships being extended.

In the prior unit, pupils generalised and developed their fluency of multiplying with fractions. In this unit, this understanding is extended to ratio and connections between ratios and fractions are explored.

Understanding multiplicative relationships: fractions and ratio

Which of the following are terminating decimals?

Match each calculation to the correct missing number.

A recipe requires 195 grams of chocolate chips to bake 30 cookies.  What weight of chocolate chips would you need to make 130 cookies?

What fraction of 300 is 45?  Give your answer in its simplest form.

If 30 is $$2\over3$$ of 45, which of the following is true?

Match the following with what needs to go in the box.

Match the following to the correct reciprocal.

A shop has a sale saving you $$1\over3$$.  You pay £36 for a sweatshirt.  How much was it originally?

$$1\over6$$ of 150 = $$5\over6$$ of {{}}.

I think of a number.  $$5\over8$$ of my number is 15.  What is my number?

The cost of a laptop increases by $$1\over8$$.  It now costs £675.  How much was it originally?

Alex's cat loses $$1\over7$$ of it's weight.  It now weighs 4.2 kg, how heavy was it last year?

This lesson will soon be taken down.

Expressing one number as a fraction of another

Lesson outcome