EXAMPLE 6 To fi nd a difference like 8 5 8, and write 1 as fractional part. Subtract 8 5 2 3 . 2 3 , we will regroup, or borrow, 1 from the whole number 3 3 so that we can represent 8 as a mixed number with an improper Solution Because 8 has no fractional part, we must rewrite it so that it does. The fractional part of 5 2 3 has a denominator of 3, so regroup 8 so that its fractional part has a denominator of 3. Write 1 as 3 3 so that it has the same denominator as 8 7 1 7 3 3 7 3 3 Replace the 8 in 8 5 2 3 with 7 3 3 . 8 5 2 3 7 3 3 5 2 3 2 1 3 2 3 . YOU TRY 6 Subtract 9 5 6 11 . 4 Add and Subtract Mixed Numbers Using Improper Fractions Another way to add and subtract mixed numbers is to change them to improper fractions fi rst. If you take an algebra class in the future, you will need to know this method. Procedure Adding and Subtracting Mixed Numbers Using Improper Fractions 1) Change each mixed number to an improper fraction. 2) Add or subtract the fractions. 3) Write the answer in lowest terms. If it is an improper fraction, change it to a mixed number. 262 CHAPTER 4 Adding and Subtracting Fractions www.mhhe.com/messersmith
messersmith_power_basic_college_1e_ch4_7_10
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