Least Common Denominator

Match the following words to their meaning.

• Bottom number of a fraction

• Multiple

• the answer when 2 numbers are multiplied

• Factor

• Smallest

• Least

• Same

• Common

• one of the numbers in a multiplication sentence

• Denominator

Tags

CCSS.4.OA.B.4

Which of these is not a multiple of 3?

• 3

• 6

• 9

• 20

Tags

CCSS.4.OA.B.4

Using the chart, find the LCD of 3 and 2.

Tags

CCSS.5.NF.A.1

CCSS.5.NF.A.2

• 2

• 4

• 8

• 12

Tags

CCSS.5.NF.A.1

CCSS.5.NF.A.2

You can add or subtract fractions with different denominators.

• True

• False

Tags

CCSS.5.NF.A.1

CCSS.5.NF.A.2

Reorder the following steps to find the LCD when adding 2 fractions that have unlike denominators.

• Find the LCM

• Write the multiplication sentences for the LCM.

• Multiply the numerator & denominator by the same factor.

• Write 2 new fractions that have the same denominator.

Tags

CCSS.5.NF.A.1

CCSS.5.NF.A.2

When adding or subtracting fractions, the numerators must be the same before you can solve the problem.

• True

• False

Tags

CCSS.5.NF.A.1

Complete the table to find the LCD of 12 and 8.

Tags

CCSS.5.NF.A.1

CCSS.5.NF.A.2

If the LCM of 2 numbers is 6, what is the LCD?

• 2

• 6

• 12

• Not enough information to answer.