Proportions Lesson 5

Forming a Unit Ratio

Kate and Christopher extend their use of diagrams to form a unit ratio in a speed context.

Episode 1: Making Sense

Kate and Christopher compare two different ways of reasoning – multiplicative reasoning and additive reasoning.

Episode 2: Exploring

Christopher and Kate figure out how many miles a car should travel in one minute so it goes the same speed as a car traveling 10 miles in 4 minutes. This results in a unit ratio.

Episode 3: Reflecting

Kate and Christopher use diagrams to demonstrate why additive reasoning does not work to find a unit ratio.