Find Rectangular Area with Unit Squares

Supplied materials

• Paper and a pencil; drawing and spoken explanations are welcome. An adult may read directions and options aloud.
• Supplied worked-case record: A rectangle five units long and four units wide holds four rows of five unit squares.
• All quantities and shape descriptions are supplied in the worked example and questions; no purchase or personal information is needed.

Learn the idea

Area counts how many same-size unit squares cover a region without gaps or overlap. In a rectangle, each row has the same number of squares. Multiplying rows by squares per row gives the area. Length units and square units describe different kinds of measurements.

Draw the stated rectangle as a unit-square grid. Multiply its side counts to find all squares, then report square units. Check with repeated row addition and distinguish the result from distance around the boundary.

Area answers how much region is covered. Report square units rather than ordinary length units. Tile the region with an equal-square grid before applying the product.

1. Tile the region with an equal-square grid before applying the product.
2. Follow the worked example. Point to each number or shape feature and say what it tells you.
3. Draw the stated rectangle as a unit-square grid.
4. Try the question and then the three practice questions. Check your answers and explain any change you make.

Check your reasoning

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Take it further

A 7 by 6 rectangle has area 42 square units.

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