Sharing in a ratio

A complete lesson on sharing an amount in a ratio. Assumes pupils have already learned how to use ratio notation and can interpret ratios as fractions - see my other resources for lessons on these topics.

Activities included:

Starter:
A set of questions to recap ratio notation, equivalent ratios, simplifying ratios and interpreting ratios as fractions.

Main:

• A quick activity where pupils shade grids in a given ratio( eg shading a 3 x 4 grid in the ratio shaded:unshaded of 1:2). The intention is that they are repeatedly shading the ratio at this stage, rather than directly dividing the 12 squares in the ratio 1:2. By the last question, with an intentionally large grid, hopefully pupils are thinking of a more efficient way to do this…
• Examples and quick questions using a bar modelling approach to sharing an amount in a a given ratio.
• A set of questions on sharing in a ratio, with a progression in difficulty. Includes the trickier variations of this topic that sometimes appear on exams (eg Jo and Bob share some money in the ratio 1:2, Jo gets £30 more than Bob, how much did they share?)
• A nice puzzle where pupils move matchsticks(well, paper images of them) to divide a grid in different ratios.

Plenary:
A final spot-the-mistake question, again on the theme of the trickier variations of this topic that pupils often fail to spot.

Printable worksheets and answers included.

Please review if you buy as any feedback is appreciated!