Unit 4 Contents

6. Look at Nila's solution.
1. How did Nila break apart 28? How did she show that?
2. What did Nila do next?
3. What was Nila's last step?
7. Look at Sara's solution.
1. How did Sara break apart 28? How did she show that?

2. What did Sara do next?
3. What was Sara's last step?
1. How are Nila and Sara's solutions alike?
2. How are they different?
9. Solve the following problems using Nila's expanded form method.
1. 46 8
2. 37 6
3. 84 7
10. Use Sara's rectangle method to solve the following:
1. 93 6
2. 77 7
3. 34 8

Solve the following problems. Find exact answers. Be prepared to show your strategy.

1. 21 6
2. 44 5
3. 86 7
4. 39 4
5. 52 9
6. 27 3
12. Choose a problem from Question 11 that you can solve using mental math or a few quick notes. Explain your thinking.
Here is how Luis solved 5 35. Use doubles to solve 4 62.