standard_description: Solve real world problems involving multiplication of fractions and mixed numbers, e.g., by using visual fraction models or equations to represent the problem.
problem_activity: Problem 1
For parts (a) and (b) below,
Solve. Show or explain your work.
Assess the reasonableness of your answer.
a.   910 × 233
b.   852 × 488
Problem 2
Damian’s work on a multiplication problem is shown below.
[IMG]
a.   Why is Damian’s answer not reasonable? Use estimation in your explanation.
b.   What mistake do you think Damian made? Why do you think he made that mistake?
c.   Find the correct product of 5,126 × 47.


aligns: no