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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

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Quizizz

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

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

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Working out an unknown given the ratio and a difference.

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

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Sharing an amount in a given ratio.

You can break most ratio questions down into 5 different types

Ratio

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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

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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

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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

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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

##### 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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Lowest Common Multiple - Listing Technique [MF5.07]

Highest Common Factor - Listing Technique [MF5.08]

Ordinary to Standard Form [MF14.04]

Standard Form to Ordinary [MF14.03]

Dividing with Standard Form [MF14.09]

Multiplying with Standard Form [MF14.08]

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Lesson 2 - Standard Form