Multiplication and Area Practice Problems

Get at least 4 correct to understand the concept!

1. What is 5 • 8?


2. What is 3 • 6?


3. What is 7 • 7?


4. What is the area, in square units, of a square with length 4?


5. What is the area, in square units, of a rectangle with length 4 and width 9?

Multiplication and Area Practice Solutions

1. 5 • 8 (or 5 x 8) is the same as 5 copies of 8.
   So, since 8 + 8 + 8 + 8 + 8 = 40, 5 • 8 is 40.


2. 3 • 6 (or 3 x 6) is the same as 3 copies of 6.
   So, since 6 + 6 + 6 = 18, 3 • 6 = 18.


3. 7 • 7 (or 7 x 7) is the same as 7 copies of 7.
   So, since 7 + 7 + 7 + 7 + 7 + 7 + 7 = 49, 7 • 7 = 49.


4. Since a square's defining characteristic is that all of its sides are equal, the area of a square can be solved by knowing the length of only one side. We are told the length of the square is 4 units, so the length and width are each 4 units.
   Now, the area is 4 • 4, which is 16, so our final answer is 16 square units.


5. Since the area of a rectangle is simply length • width (length x width), and we know both of these (4 and 9 units, respectively) we can solve for the area.
   length • width = area
   4 • 9 = area
   4 • 9 = 36
   Our area is 36 square units.