A student uses square tiles measuring 1 centimeter on each side to find the area of the square. Her reasoning is shown. I covered the top and bottom edges of the square with 5 tiles each.
Then I covered the left and right edges with 3 tiles each. I added up all the tiles I used to get a total area of 20 square centimeters. 5+5+5+5=20
Identify the two errors in the student’s reasoning and describe how to correctly use square tiles to find the area of the square. Give the correct area of the square.
Question 2
2.
Write a multiplication sentence that models how to find the area of the square shown. Give the area of the square.