Ages 8–9🧮 Mathematics9 verified questions on this shelf

Area by Tiling

Find the area of a rectangle by tiling it with unit squares and show that the result equals the product of the side lengths

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Question 1 of 3

Lily draws a rectangle on graph paper that is 7 squares long and 5 squares high. She tiles it completely with 1‑by‑1 squares. She first counts how many squares are in each column (5) and then multiplies by the number of columns she thinks she sees. Because she counts the border line as a column, she says there are 8 columns. What is the correct number of unit squares that cover Lily’s rectangle?

Question 2 of 3

Jamal is covering a rectangular garden patch that is 2 squares long and 9 squares wide with 1‑inch square tiles. He arranges the tiles in straight rows. Which statement correctly explains why counting the 2 rows and then counting the 9 tiles in each row tells him how many tiles are needed total?

Question 3 of 3

You draw a rectangle that is 4 squares long and 6 squares wide on graph paper. If you fill it completely with 1‑by‑1 squares, how many little squares will you have inside the rectangle?

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Skill names and descriptions include the Marble Skill Taxonomy © Generative Spark, Inc. (withmarble.com), licensed under ODbL 1.0 (database) and CC BY-SA 4.0 (content). Practice questions are GlowGrades's own, each checked by independent verifiers that must agree before a child ever sees it.