Feedback for Set 2, Item 1

Answer of 450 (correct answer)

//Key is 450

Your answer: 450 people

Good thinking!! You correctly found that 450 people can run the race this year.

If you are interested, check out 2 other ways to solve this question:

This video uses two common strategies for describing calculations of this kind.

This video uses a number line to model the combinations and determine the correct number of letters.

Unclear Answer

Your answer: (Statement that is was one of two answers (4.5 or 4,500)

Your answer is not very clear because it sounds like multiple answers.

If you want to see how to use a table to solve this question, see this video.

Answer of 150

//distractor A1 is 150

Not quite! You answered: 150 people

It’s critical to think about what the question asks. The question asks for the number of people racing this year, but 150 is the number that raced last year.

This video shows why 150 is incorrect and how to find the correct answer.

Answer of 45

//distractor A2 is 45

Your answer: 45 people

But the actual answer was much greater because it is 150 multiplied by 3. This video shows why 45 is to few, and how to find the correct answer.

Answer of 564

Close! Your answer: 564 people

But, the questions said that 38 students could not race last year, so we should use 188 – 38 as the number of racers last year. This video shows how to catch this mistake and find the correct answer.

Answer of 114

//distractor A4 is 114

Close! Your answer: 114 people

But, the questions said that 38 students could not race last year, so we should use 188 – 38 as the number of racers last year. This video shows how to catch this mistake and find the correct answer.