Adding Mixed Numbers with Unlike Denominators

What is the first step in solving the given problem?

• Subtracting the fractions

• Breaking down the mixed numbers into whole numbers and fractions

• Multiplying the whole numbers

• Finding the least common multiple

Tags

CCSS.7.NS.A.1C

What is the sum of the whole numbers 3, 11, and 4?

• 22

• 18

• 20

• 15

Tags

CCSS.2.NBT.B.7

CCSS.3.NBT.A.2

Why do we need to find a common denominator when adding fractions?

• To make the fractions easier to subtract

• To ensure the fractions have the same base for addition

• To convert the fractions into whole numbers

• To simplify the fractions

Tags

CCSS.5.NF.A.1

CCSS.5.NF.A.2

What is the least common multiple (LCM) of 12, 5, and 15?

• 30

• 45

• 60

• 75

What is the prime factorization of 12?

• 2 x 2 x 5

• 2 x 3 x 5

• 2 x 2 x 3

• 3 x 5

How do you convert 1/12 to have a denominator of 60?

• Multiply both numerator and denominator by 4

• Multiply both numerator and denominator by 15

• Multiply both numerator and denominator by 5

• Multiply both numerator and denominator by 12

Tags

CCSS.3.NF.A.3B

CCSS.4.NF.A.1

What is 2/5 converted to a fraction with a denominator of 60?

• 10/60

• 12/60

• 24/60

• 30/60

Tags

CCSS.3.NF.A.3B

CCSS.4.NF.A.1

What is the sum of the fractions 5/60, 24/60, and 12/60?

• 39/60

• 41/60

• 43/60

• 45/60

Tags

CCSS.4.NF.B.3C

CCSS.4.NF.B.3D

What is the final mixed number result of the addition problem?

• 18 and 39/60

• 18 and 41/60

• 19 and 39/60

• 19 and 41/60

Tags

CCSS.7.NS.A.1C

Why is it important to simplify the final fraction in a mixed number?

• To make it easier to multiply

• To make it easier to subtract

• To ensure the fraction is in its simplest form

• To convert it into a whole number