# 23/24 EHE L11 Yr 10 - Ratio & Proportionality

Jeremy Day

Created on October 16, 2023

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## Transcript

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Lesson 11 - Ratio & PRoportionality

1. List all the factors of 122. What is true about a scalene triangle?3. 3/5 × 4/74. Expand 3 ( 4p - 5 )5. √25 - √166. Convert 75ml into L7. What is the formula for the Area of a Circle?8. - 5 - - 6 + - 10

Challenge

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Quizizz

05

Simplifying Ratios. The easiest, but mistakes are often made.

04

Combining two separate ratios into one, usually 3-way, ratio.

03

Working out an unknown given the ratio and a difference.

02

One part of the ratio is given, you need to find the other.

01

Sharing an amount in a given ratio.

You can break most ratio questions down into 5 different types

Ratio

01

Sharing an amount in a given ratio.

Sue and Jane win the lottery. They win £47 and share the winnings in the ratio 2:3How much does each person get?

Ratio

02

One part of the ratio is given, you need to find the other.

A model of a house has a scale 1:100. The height of the model is 8cm. How tall is the house in metres?

Ratio

03

Working out an unknown given the ratio and a difference.

Jo, Doug and Phil share sweets in the ratio 1 : 4 : 3Phil gets 40 more than Jo.How many does Phil get?

Ratio

04

Combining two separate ratios into one, usually 3-way, ratio.

To make a purple paint the ratio of red to blue paint is 1 : 4The ratio of blue to white paint is 3 : 1What is the ratio of red to blue to white paint?

Ratio

05

Simplifying Ratios. The easiest, but mistakes are often made.

Write down the number of left-handed girls to right-handed girls as a ratio. Give your answer in its simplest form.

Here is some information about a group of children.

Ratio

Ratio

##### 2) When I harvested my apples I found some had been eaten by wasps, some were rotten and some were good. These were in the ratio 6 : 5 : 25. Eighteen of my apples had been eaten by wasps. a) What percentage of my apples were rotten? b) How many good apples did I get?

##### 1) The soft drinks Coke, Orange and Vimto were bought for the school disco in the ratio 10 : 5 : 3. The school bought 80 cans of Orange. a) How much Coke did they buy? b) How much Vimto did they buy?

Ratio

Proportionality

Better Value [MF16.04]

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02

01

03

Lowest Common Multiple - Listing Technique [MF5.07]

Highest Common Factor - Listing Technique [MF5.08]

Century Tasks

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HCF, LCM + Best Buy

Ordinary to Standard Form [MF14.04]

Standard Form to Ordinary [MF14.03]

Dividing with Standard Form [MF14.09]

Multiplying with Standard Form [MF14.08]

02

01

03

04

Week 2 Tasks

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Lesson 2 - Standard Form

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https://drive.google.com/file/d/1cw-5LkBKjywGEAnNUU7bDLDsUHd4x1ia/view?usp=sharing

https://drive.google.com/file/d/1cw-5LkBKjywGEAnNUU7bDLDsUHd4x1ia/view?usp=sharing

https://drive.google.com/file/d/1cw-5LkBKjywGEAnNUU7bDLDsUHd4x1ia/view?usp=sharing