In the same ratio
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Lesson details
Key learning points
- 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.
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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
Q2.
Fill in the gap: We can describe the relationship between two values using __________ notation.
group
problem
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
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
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
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.
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
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
Q4.
Fill in the missing ratio: I mix 2 litres of squash with 7 litres of water. The ratio of squash to water is …. : ....
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.
3
4
5