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Ratio and proportion

Three lessons on comparing and scaling quantities: recipes and best value, sharing an amount in a given ratio, and reading scale drawings and maps. Fractions of amounts (Module 3) is worth having secure first.

Module4 of 8

Lessons in this module3

Published3 of 3

4.1

Direct proportion and scaling

Adjusting recipes, comparing unit prices, and the unitary method

Read now 4.2

Sharing by ratio

Parts and wholes, finding the total number of parts, and working backwards from a share

Read now 4.3

Scale factors and maps

Scale drawings, enlargements and map scales

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