### Home > MC1 > Chapter 7 > Lesson 7.3.1 > Problem 7-105

7-105.

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.