Question 1
What is the most common model used for decimal fractions?
◦ Rational number wheel.
◦ Base ten strips and squares.
◦ 10 × 10 grids.
◦ Number line.
Question 2
Construct an example of when confusing additive and proportional thinking could result in an incorrect answer. Describe an incorrect process that a learner might follow. Describe a correct way to find the solution and a way you might help the learner to see his or her error.