Testinar Grade 3 math

Counting Unit Squares for Area

Students will find area by counting the unit squares that cover a figure.

CH06-04 Geometry and Measurement

Directions Solve each problem. Show your reasoning on the page or on separate paper. Check the answer key only after finishing.

A rectangle is covered with \(4\) rows of \(5\) unit squares. What is the area? You can count by rows: \(5 + 5 + 5 + 5\).
1. \(5\) sq units
2. \(9\) sq units
3. \(20\) sq units
4. \(25\) sq units
This shape is made of unit squares on a grid. How many unit squares cover this rectangle?
1. \(6\) sq units
2. \(5\) sq units
3. \(8\) sq units
4. \(10\) sq units
A grid shows a T-shaped figure made of unit squares. You can count by columns or by rows. How many unit squares form this T-shape?
1. \(5\) sq units
2. \(7\) sq units
3. \(10\) sq units
4. \(15\) sq units
This grid shows a shape made of unit squares. What is the area?
1. \(12\) sq units
2. \(10\) sq units
3. \(14\) sq units
4. \(7\) sq units
A rectangular garden on a grid is \(2\) meters long and \(3\) meters wide. Count by skip-counting: \(3 + 3\). What is the area?
1. \(2\) sq m (counted just one side)
2. \(3\) sq m (counted just one side)
3. \(5\) sq m (added length and width)
4. \(6\) sq m (counted all squares)
This rectangle is divided into unit squares. Which multiplication sentence shows the area?
1. \(5 \times 2 = 10\)
2. \(5 \times 5 = 25\)
3. \(2 \times 2 = 4\)
4. \(7 \times 2 = 14\)
A floor tile is \(1\) inch by \(1\) inch. A floor has \(8\) rows and \(6\) tiles in each row. What is the area?
1. \(14\) sq in
2. \(48\) sq in
3. \(28\) sq in
4. \(64\) sq in
This grid shows a rectangle on unit squares. What is the area in square units?
1. \(8\) sq units
2. \(10\) sq units
3. \(12\) sq units
4. \(14\) sq units

Teacher and parent reference

Answer key and explanations

C. \(20\) sq units
Count by rows: \(5 + 5 + 5 + 5 = 20\) unit squares. This is one way to count area.
A. \(6\) sq units
The grid shows \(3\) columns and \(2\) rows. \(3 \times 2 = 6\) unit squares.
B. \(7\) sq units
Count the top row: \(5\) squares. Count the center column below: \(2\) more squares. Total: \(5 + 2 = 7\) unit squares.
A. \(12\) sq units
\(4\) columns \(\times\ 3\) rows \(= 12\) unit squares.
D. \(6\) sq m (counted all squares)
Count by rows: \(3 + 3 = 6\) square meters. Distractor A and B count only one row. Distractor C adds the sides (perimeter idea).
A. \(5 \times 2 = 10\)
The rectangle has \(5\) units wide and \(2\) units tall. \(5 \times 2 = 10\) sq units.
B. \(48\) sq in
\(8\) rows \(\times\ 6\) tiles per row \(= 48\) square inches.
C. \(12\) sq units
\(6\) units wide \(\times\ 2\) units tall \(= 12\) unit squares.