Dark clouds gathered over the campsite as Emek and Luna hurried to protect the supply shelter. Its rectangular floor could be covered with square tiles arranged in 5 rows and 7 columns. Instead of counting each space one at a time, Luna used the rows and columns. They needed 35 tiles to cover the whole floor with no gaps. Emek checked by counting the tiles in the finished rows. They placed all 35 tiles just before the rain began.
Challenges
Challenge 1 of 5
Challenges
Challenge 1 of 4
Hint
Think about equal groups: there are 5 rows with 7 tiles in each row.
The shelter floor has 5 rows of tiles with 7 tiles in each row. Which calculation can be used to find the number of tiles covering the floor?
5 + 77 - 55 x 77 + 7Correct! Multiplying the number of rows by the number of tiles in each row finds the total area in square tiles.
Try again. Use the 5 equal rows of 7 tiles to choose the calculation.
Next🎉 Congrats! You got this question!
Hint
Find the total in 3 equal rows of 7 tiles.
Emek has finished 3 of the shelter's 5 rows. Each finished row has 7 tiles. How many tiles has he placed so far?
Correct! Three rows of 7 tiles contain 21 tiles.
Try again. Multiply the number of finished rows by the number of tiles in each row.
Next🎉 Congrats! You got this question!
Hint
Compare 5 x 7 with 7 x 5.
Luna says the same 35 square tiles could also make a rectangle with 7 rows and 5 columns. Which statement is correct?
The new rectangle would need 2 more tiles.The new rectangle would need 2 fewer tiles.The new rectangle would need 12 tiles.The new rectangle would still use 35 tiles.Correct! Changing the order of the rows and columns does not change the total number of square tiles.
Try again. Find the number of tiles in 7 rows of 5 and compare it with 35.
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