This Problem Set is part of the the Lesson 2, Unit 2, Grade 5. In #3b some of you wrote 4 x (14 + 26) and others wrote (14 + 26) x 4. Are both expressions acceptable? Explain. Were you able to answer #4 without actually solving Expressions A and B? How? A student got 85 for #5a. Can you identify the error in thinking? Look at #6. How were you able to answer parts (b) and (c) without knowing how to compute with some of the numbers in the expressions?