Why is it necessary to find a common denominator when adding or subtracting fractions?

• To ensure the fractions have the same base for accurate addition or subtraction

• To convert fractions to whole numbers

• To simplify the fractions

• To make the numerators equal

What is the least common multiple (LCM) of 4, 5, and 10?

• 25

• 20

• 15

• 10

How do you convert 1/4 to a fraction with a denominator of 20?

• Multiply the numerator by 5 and the denominator by 4

• Multiply both the numerator and denominator by 5

• Multiply the numerator by 4 and the denominator by 5

• Multiply both the numerator and denominator by 4

What is 3/5 converted to a fraction with a denominator of 20?

• 15/20

• 6/20

• 12/20

• 9/20

What is the result of 5/20 + 12/20 - 6/20?

• 12/20

• 10/20

• 13/20

• 11/20

What is the least common multiple (LCM) of 9, 6, and 3?

• 18

• 15

• 12

• 9

How do you convert 4/9 to a fraction with a denominator of 18?

• Multiply the numerator by 3 and the denominator by 2

• Multiply both the numerator and denominator by 2

• Multiply the numerator by 2 and the denominator by 3

• Multiply both the numerator and denominator by 3

What is 1/6 converted to a fraction with a denominator of 18?

• 2/18

• 3/18

• 4/18

• 6/18

What is 1/3 converted to a fraction with a denominator of 18?

• 6/18

• 3/18

• 4/18

• 5/18

What is the result of 8/18 - 3/18 + 6/18?

• 9/18

• 12/18

• 10/18

• 11/18