# In the same ratio

## Slide deck

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## Lesson details

### Key learning points

1. In this lesson, we will learn to scale up from one group to 'many' groups and use multiplicative relationships to calculate unknown values in the 'many' groups.

### Licence

This content is made available by Oak National Academy Limited and its partners and licensed under Oak’s terms & conditions (Collection 1), except where otherwise stated.

## Video

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## Worksheet

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## Starter quiz

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### 5 Questions

Q1.
Fill in the gap: We can describe the ____________ between two or more quantities by comparing them with each other.
group
problem
ratio
Correct answer: relationship
Q2.
Fill in the gap: We can describe the relationship between two values using __________ notation.
group
problem
Correct answer: ratio
relationship
Q3.
I make groups of grey and white counters in the ratio 3:4. How many grey counters are there in two groups?
12
5
Correct answer: 6
8
Q4.
I make groups of grey and white counters in the ratio 3:4. How many white counters are there in five groups?
15
Correct answer: 20
35
9
Q5.
I make groups of grey and white counters in the ratio 3:4. How many grey counters and white counters are there in 100 groups?
300
400
500
Correct answer: 700

## Exit quiz

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### 5 Questions

Q1.
Fill in the gap: Two quantities are said to be in the same ratio, if there is an equivalent _____________ relationship between them.
Correct answer: multiplicative
proportion
ratio
times
Q2.
Fill in the gap: 2 litres of red paint and 5 litres of white paint are in the same_______ as 5 litres of red paint and 12.5 litres of white paint.
multiplicative
proportion
Correct answer: ratio
times
Q3.
I mix 2 litres of squash with 3 litres of water. I need more that tastes the same. How much squash should I mix with 9 litres of water?
2 centilitres
27 litres
4 litres
Correct answer: 6 litres
Q4.
Fill in the missing ratio: I mix 2 litres of squash with 7 litres of water. The ratio of squash to water is …. : ....
Correct answer: 2 : 7
2 : 9
7 : 2
9 : 7
Q5.
Fill in the missing number: I mix 4 litres of yellow paint with 10 litres of red paint. The ratio of yellow to red is …. : 5.
Correct answer: 2
3
4
5