3rd Grade Math E1

Part A: The rectangular fence around Pine Hill Park is shown in the figure. The perimeter of the fence is 108 yards. One of the side lengths is missing. What is the missing side length, in yards, in the figure?

Part B: Pine Hill Park builds a new rectangular fence with the same perimeter of 108 yards, but with different side lengths. Which of these could be the new side lengths?

• 20 yards by 34 yards

• 21 yards by 33 yards

• 19 yards by 35 yards

• 18 yards by 37 yards

Ken draws a rectangle with an area of 42 square inches. The width of the rectangle is 6 inches. What is the length, in inches, of Ken’s rectangle?

Part A: Jeanie’s Button Collection

Colors and Counts:

• 24 blue

• 18 green

• 27 red

• 31 yellow

Jeanie explains there are a total of 1,002 buttons because 4 + 8 + 7 + 1 = 20 in the ones place, so she writes down 20. Then 2 + 1 + 2 + 3 = 8 in the tens place, so she writes down 80 in front of the 20 and says the total is 1,002. Explain why Jeanie’s reasoning is incorrect. Find the actual total number of buttons she has.

Evaluate responses using AI:

OFF

Part B: Jeanie says there are 19 more yellow buttons than green buttons because she subtracted 1 – 8 = 7 and then 3 – 1 = 2, and wrote down 27. Explain why Jeanie’s reasoning is incorrect. Find how many more yellow buttons than green buttons she has.

Evaluate responses using AI:

OFF

The first 10 presidents of the United States were born in four states. The bar graph shows the number of presidents born in each state.

Part A: How many more presidents were born in Virginia than in New York?

• 5

• 3

• 6

• 4

Part B: What is the difference between the number of presidents born in Massachusetts and the number of presidents born in New York and South Carolina together?

• 4

• 10

• 8

• 2