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Home > CC1 > Chapter 4 > Lesson 4.1.3 > Problem 4-35


Estimate each sum or difference below by stating which whole numbers the answer should be between. Then check your conclusion by calculating the actual sum or difference.  

  • About how big should their difference be? Estimate by first subtracting from and then subtracting from .

  • To estimate the difference, try rounding the first term to and the second term to .

  • To calculate the sum, you may want to convert these mixed numbers into fractions greater than one before adding.

    The answer should be between and .
    How can you tell?

    • Since each of these have a portion just over one-half, try rounding one up to the nearest whole number and rounding the other one down.