3rd grade math

posted by .

front end estimation to estimate the sum...like..436+517= ~~~~~~also we have some problems that say use rounding to estimate the sum...like..236+710=....DO WE DO BOTH OF THESE THE SAME WAY??? solve then estimate??? my child has been out from school for a few days sick and missed this. Thanks!

  • 3rd grade math -

    front end estimation: 436+517=400+500=900
    rounding: 236+710= 200+700=900
    front end estimation:
    * Add the digits of the two highest place values
    * Insert zeros for the other place values


    * Example 1: 4496 + 3745 is estimated to be 8100 by front end estimation (i.e. 4400 + 3700).
    * Example 2: 4496 + 745 is estimated to be 5100 by front end estimation (i.e. 4400 + 700).

    rounding:
    * Rounding makes numbers that are easier to work with in your head.
    * Rounded numbers are only approximate.
    * An exact answer generally can not be obtained using rounded numbers.
    * Use rounding to get a answer that is close but that does not have to be exact.

    How to round numbers
    * Make the numbers that end in 1 through 4 into the next lower number that ends in 0. For example 74 rounded to the nearest ten would be 70.
    * Numbers that end in a digit of 5 or more should be rounded up to the next even ten. The number 88 rounded to the nearest ten would be 90.

  • 3rd grade math -

    attn(happy face)thank you!!

  • 3rd grade math -

    ashton broke apart a number into 30+7. what number did she start with?

  • 3rd grade math -

    use any methond to eastimate each difference

  • 3rd grade math -

    use any method estimate 667-651

Respond to this Question

First Name
School Subject
Your Answer

Similar Questions

  1. Elementary Math

    Can you explain what the difference between rounding and front end estimation is?
  2. 5th grade Math

    You want to estimate 5.25-3.3. Why would using front-end estimation and adjusting tell you more about the answer than rounding?
  3. math

    You want to estimate 5.25-3.3 why would using front-end estimation tell you more about the answer than rounding?
  4. 3rd grade math

    i need help!! if the estimate is greater than or equal or 1,500, find the exact sum. if the estimate is less than 1,500, do not solve the problem. 867+734=1601 number model:_______________?
  5. Math

    Melvin estimate 645 + 322 by adding 600 + 300. Is his estimate sum an over or under estimate please?
  6. math

    1.Estimate 45 x 56 using front-end. 2.Estimate 45 x 56 using rounding.
  7. 4th grade math

    3. Writing to Explain Use rounding to estimate the product 13 ! 9. Then, use compatible numbers to find the actual answer. If Alison was rounding to find how much 13 books that were $9 apiece cost, would she get a good estimate?
  8. math

    Can someone please show me how to estimate mixed numbers. An exsample like 6 and two thrids times 4 and one fifth. Also estimate by rounding to 0, 1/2, or 1. Exsample...5/8x9/10. I would appreciate any help I am in the 6th grade and …
  9. math

    cleon would like to estimate the difference between$579 and$85.explain how cleon ccoulduse rounding to make an estimate
  10. 5th grade math

    Name the compatible numbers used to find the estimate. 1. 725/19 estimate:35 2. 3,641/34 estimate:120 Please show me how to work out these problems.

More Similar Questions