Adding & Subtracting Fractions with Unlinke Denominators

What is the least common denominator you could use to subtract 1/3 and 1/4?

• 3
• 4
• 24
• 12

Is this a correct answer?

• Yes, the student correctly added.
• No, you cannot add unlike denominators
• No, 5 + 7 is not 12
• No, 2 + 3 is not 5

Tags

CCSS.5.NF.A.1

CCSS.5.NF.A.2

What is the first step in solving this problem? 
⅘ + ½ =

• Add the top parts of the fraction
• Rewrite the fractions in the simplest form. 
• Find a common denominator. 
• Make each fraction into an improper faction. 

Tags

CCSS.5.NF.A.1

CCSS.5.NF.A.2

• 5/6
• 1
• 1  1/6
• 8/6

Tags

CCSS.7.NS.A.1C

• 1/12
• 1
• 2/35
• 23/25

Tags

CCSS.7.NS.A.1C

I ate 1/3 of a pizza. Cody ate 1/2 of the same pizza. How much did we eat of the pizza?

• 5/6

• 1 whole

• 2/6

• 9/12

I ate 1/4 of a chicken. Harry ate 1/3 of the same chicken. When we are done eating, how much of the chicken is left over?

• 4/12

• 3/12

• 2/12

• 5/12

Paula made some chili with 1/2 of a can of black beans and 3/8 of a can of pinto beans. How many cans of beans did Paula use in all?

• 4/10
• 4/8
• 7/8
• 1/8

At a pie-eating contest, Anita got through 1/4 of a pie before time was called; Hayley finished just 1/8 of a pie. How much more pie did Anita eat than Hayley?

• 2/12
• 3/8
• 1/8
• 2/16

Sally ran 1/3 of a mile and swam 5/6 of a mile. In simplest form, how much farther did she swim than she ran?

• 1/2
• 5/18
• 4/3
• 3/6