Adding and Subtracting Fractions with Common Denominator Word Problems

LCM is helpful when (2 answers)

• reducing a fraction to its simplest form

• finding a common denominator to compare fractions

• finding a common denominator to add/subtract fractions

• reducing a mixed fraction to improper

Check off everything you need to do before adding/ subtracting fractions:

• find the gcf of all fractions

• find the LCM of all denominators

• find the LCM of all numerators

• make whole numbers over 1

Check all fraction operations that required common denominators:

• addition

• subtraction

• multiplication

• division

• comparing fractions

• F

• G

• H

• J

Kayla has 3/9 of a pizza and Lille gave her 2/9 of a pizza. How much pizza does Kayla have now?

• 5

• 5/9

• 1/9

• 6/9

Mrs. Clements has to walk 8/10 of a mile to school. She has already walked 2/10 of a mile. How much does she have left to walk?

• 3/10

• 6/10

• 4/8

• 4/10

If Sadie ate a 2/9 of a pizza, and Payton ate 3/9 of a pizza, how much much of the pizza was left?

• 4/9

• 9/5

• 5/9

• 4/5

What is the least common denominator of the fractions 1/4 and 2/3 ?

• 2

• 4

• 8

• 12

Devon combines 1/3 cup of raisins and 1/2 cup of granola to make a snack. How many cups of raisins and granola does Devon use?

• 2/5 cup

• 3/6 cup

• 2/6 cup

• 5/6 cup