Lesson 7: Practice Problems

Problem 1

Here is a rectangle that has been partitioned into four smaller rectangles.

A rectangle partitioned into smaller rectangles A, B, C, D. The height is 2.6 and width 3.4.

For each expression, choose the sub-rectangle whose area, in square units, matches the expression.

  1. A

  2. B

  3. C

  4. D

Problem 2

Here is an area diagram that represents . 

A area diagram for 3.1 times 1.4. A has height 1 and width 3.1. B has height 0.4 and width 3.1

  1. Find the areas of sub-rectangles A and B.

  2. What is the area of the 3.1 by 1.4 rectangle?

Problem 3

Draw an area diagram to find . Label and organize your work so that it can be followed by others.

Problem 4

Find each product. Show your reasoning.

Problem 5 From Unit 5 Lesson 3

Complete the calculations so that each shows the correct sum or difference.

  1. addition problem with blanks, 2.3 blank plus blank .64 equals 9. blank
  2. addition problem with blanks, 2.3 blank plus blank .64 equals 9. blank 2
  3. addition problem with blanks, 4.3 blank plus blank .15 equals 6. blank 2
  4. addition problem with blanks, 1.5 blank plus blank .38 equals 1. blank 4

Problem 6 From Unit 2 Lesson 12

Diego bought 12 mini muffins for $4.20.

number of
mini muffins

price in
dollars

  1. At this rate, how much would Diego pay for 4 mini muffins?

  2. How many mini muffins could Diego buy with $3.00? Explain or show your reasoning. If you get stuck, consider using the table.