Sand Reckoning
Yellow
Green
Blue
Red
Magenta
Remove
LESSON 4 Exponents and Large Numbers
Reckoning
Reckoning is counting or calculating. In the story "Sand Reckoning," a girl named Ellen learns about calculating and counting with large numbers. First, she and her father estimate the number of leaves she will have to rake in her yard.
- The rectangle below is a sketch of Ellen's yard. What is the area of the yard?
- If Ellen's father estimates that each square foot has 100 leaves, how many leaves does Ellen have to rake?
- There are 20 houses on Ellen's block. If each house has about the same number of leaves, how many leaves are on Ellen's block?
- There about 300 blocks in Ellen's town. Estimate the number of leaves in the town.
