1. Consider the outline of the figure below. Investigate how to cover up that outline by arranging different blocks to fit into the space exactly. If you were to use only one type of block, which block can be used to cover the outline?

Unpack Your Student's Thinking…

1. You have 10 different rods – each a different color and a different length. If you use just the red rods and put them together in a train (one next to each other), what other length rods could you make? List the other rods by color. Explain why only some rods work.

1. There are three school buses that take a total of 35 students to school. In order for the bus to run it must have at least 10 kids and no more than 20 kids on it. How many children could be on each bus?

2. I raked leaves. It took me at most ten minutes to fill a sack. How long did it make me to fill 3 sacks?

3. Sara had some dolls. She has an even number of dolls and an odd number of friends. Can she give all of her friends an equal number of dolls to play with? Explain.

4. Pam made a dozen pumpkin cookies. Stan, Will, and I each got the same number of cookies, but Carly didn’t get any. How many pumpkin cookies could we each get? Explain with words or pictures.

5. Bob had 4 bags of gumballs. Each bag had 10 gumballs in it. Then his mom gave him a bag with 13 gumballs in it. how many more gumballs does the bag his mom gave him have than his previous bags?

1. John has 4 chickens and 3 cows on his farm. Are there more chicken legs or cow legs? Why?

2. Mr. Brown has a total of 11 cows and horses. If he has more cows than horses, how many could he have of each?

3. Joe had 3 toy cars. Susan gave him most of her cars. Joe now has 9 cars. How many toy cars could Susan and Joe have had together?

4. Katie has 7 stickers. She needs to have 15 to pick out of the treasure box. How many more stickers does she need? Explain how you found this number with pictures or words.

5. Sara has some animal crackers. Brittany gave her 5 more. Now she has more than 10 animal crackers. How many could Sara have started with? Explain your answer with words or pictures.

6. Jana has 3 more markers than Lyla. How many markers might each girl have?