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

When the denominators are not the same, I must find a...

• common numerator

• common denominator

• equivalent fraction

• mixed number

Tags

CCSS.4.NF.A.1

CCSS.5.NF.B.5B

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.7.NS.A.1C

When adding or subtracting fractions, I NEVER add or subtract the...

• numerators

• denominators

• mixed numbers

• equivalent fractions

Tags

CCSS.4.NF.B.3C

CCSS.4.NF.B.3D

Do I have to find a common denominator to solve this?

• Yes

• No

Tags

CCSS.5.NF.A.1

CCSS.5.NF.A.2

Jordan ate 8/12 of a pizza. Michael ate 1/3 of a pizza.

Who ate more pizza and by how much?

(Hint: you can compare fractions if they have a common denominator)

• Jordan by 4/12

• Michael by 7/12

• Michael by 9/12

• Jordan by 1/3

Tags

CCSS.4.NF.A.2

Which answer is correct?

• 36623 jump ropes

• 122 jump ropes

• 244 jump ropes

• 732 jump ropes

Answer explanation

To solve  $\frac{366}{1}\times\frac{2}{3}\ =\frac{366\times2}{3\times1}=\frac{732}{3}$  multiply straight across to get the 732/3, then divide to get your final answer.

Tags

CCSS.4.NF.B.4B

CCSS.4.NF.B.4C

Ok, add them. Don't forget to get a common denominator!

• 1

• 2

• 3

• 4

Answer explanation

We want to know Bonnie's slices + Noel's slices to find out how much they ate in all.

Tags

CCSS.5.NF.A.1

CCSS.5.NF.A.2

• 5/24

• 1

• 0

• 1/4

Tags

CCSS.5.NF.B.6

What is the key word in this problem?

• "of," multiply

• "eat," subtract

• "all together," add

Answer explanation

We want to know Bonnie's slices + Noel's slices to find out how much they ate in all.

Tags

CCSS.5.NF.A.1

CCSS.5.NF.A.2