Fractions Adding Subtracting Unlike Denominators

Which shows a way to solve 3/7 + 2/5

• _{Add the numerators first, then add the denominators.}

• Find the LCD for 7 and 5, then make equivalent fractions and then subtract

• Find the LCD for 7 and 5, then make equivalent fractions and then add

• Find the LCD for 7 and 5, then multiply both numerators by 5.

Sally ran 6/12 of a mile. Jeremy ran 2/3 of a mile. How much did they run altogether?

• 5/8 mile

• 8/12 mile

• 8/15 mile

• 1and 2/12 miles

What is the Least Common Denominator for 1/2 and 1/4

• 8

• 2

• 4

• 16

Find the difference:

7/9 - 2/5

• 17/45

• 5/4

• 5/9

• 5/45

Find the sum of 3/8 and 2/6

• 5/14

• 17/24

• 5/8

• 5/6

Add 6/14 and 1/2

• 7/16

• 13/14

• 7/14

• 3/4

Find the LCD for 1/3 and 2/9

Add 5/8 and 3/12

• 8/12

• 8/16

• 15/24

• 21/24

What is the first step in finding the Least common Denominator for two fractions?

• List all of the multiples of each numerator

• Multiply the numerators together

• Add the denominators

• List the first few multiples of each denominator

Add 1/3 + 7/10

• 1 and 1/30

• 8/13

• 8/30

• 8/10