window washers math challenge

Lesson: Window Washer
Grade Level: 2 to 4
Skills: Subtraction, addition, division

You’ve just been hired as a window washer for the world’s tallest building. The building has 209 floors. That’s a lot of washing you have to do!!!

You decide to start washing windows from the top floor and work your way down.

You’re able to wash 19 floors a day. How many days is it going to take you to wash the windows on every floor of the building?

Challenge: How many (whole) days would it take, if you wash windows on only 14 floors each day?

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