Busy. Please wait.

show password
Forgot Password?

Don't have an account?  Sign up 

Username is available taken
show password


Make sure to remember your password. If you forget it there is no way for StudyStack to send you a reset link. You would need to create a new account.
We do not share your email address with others. It is only used to allow you to reset your password. For details read our Privacy Policy and Terms of Service.

Already a StudyStack user? Log In

Reset Password
Enter the associated with your account, and we'll email you a link to reset your password.
Don't know
remaining cards
To flip the current card, click it or press the Spacebar key.  To move the current card to one of the three colored boxes, click on the box.  You may also press the UP ARROW key to move the card to the "Know" box, the DOWN ARROW key to move the card to the "Don't know" box, or the RIGHT ARROW key to move the card to the Remaining box.  You may also click on the card displayed in any of the three boxes to bring that card back to the center.

Pass complete!

"Know" box contains:
Time elapsed:
restart all cards
Embed Code - If you would like this activity on your web page, copy the script below and paste it into your web page.

  Normal Size     Small Size show me how

Estimating 5 digits

Estimating sums and differences with 5 digit numbers

Mrs. Franks asked community members to donate school supplies to Harrison. They donated 33,942 pencils and 28,434 notebooks. About how many more pencils, to the nearest hundreds, were donated than notebooks? There are about 5,500 more pencils than notebooks.
The Hershey’s Factory made 29,035 chocolate bars on Monday and 45,823 bars on Tuesday. To the nearest ten thousand, about how many chocolate bars did the factory make in all those two days? The factory made about 80,000 chocolate bars in all.
Mr. Hale is trying to estimate how much black and green construction paper he has. He has 76,382 pieces of black paper and 91,824 pieces of green. To the nearest thousand, about how many more pieces of green does he have than black? Mr. Hale has about 16,000 more pieces of green construction paper than black construction paper.
Janelle bought a dozen bags of beads. There are 62,353 red beads and 79,804 blue beads in the bag. To the nearest ten thousand, about how many beads are there in all? There are about 140,000 beads in all.
Ms. Gilberts observes a field to determine how many tulips and daises there are. She counts 69,242 tulips and 55,853 daises. Determine about how many more tulips there are than daises, to the nearest thousand. There are about 13,000 more tulips than daisies in the field.
Scientists tracked a humpback whale for The whale swam 54,398 miles the 1st year and 68,875 miles the next. About how many more miles, to the nearest thousand, did the whale swim the 2nd year than the 1st? The humpback whale swam about 15,000 miles more in the second year.
Ms. Mary Mack is jumping on a trampoline. She jumped 13,292 inches on her first try. She then jumped 38,742 inches on her second try. About how many inches did she jump in all, to the nearest ten thousand? Ms. Mary Mack jumped about 50,000 inches in all.
An architect designs a building that is 29,281 inches tall. The tallest building is 32,664 inches tall. About how much taller, to the nearest thousand, does the architect need his building to be so that it is as tall as the tallest building? The architect's building needs to be 4,000 inches taller to be as tall as the other building.
Created by: HarrTeacher