Multiplying Mixed Numbers with Cross Cancellation

What is the first step in multiplying mixed numbers?

• Subtract the fractions

• Add the whole numbers

• Convert them to improper fractions

• Divide the whole numbers

Tags

CCSS.5.NF.B.6

How do you convert a mixed number to an improper fraction?

• Subtract the numerator from the whole number

• Multiply the whole number by the denominator and add the numerator

• Add the whole number to the numerator

• Divide the numerator by the denominator

What is the improper fraction form of 10 and 1/8?

• 80/8

• 80/9

• 81/9

• 81/8

What is the purpose of cross cancellation?

• To convert fractions to mixed numbers

• To divide fractions

• To add fractions

• To simplify fractions before multiplying

Tags

CCSS.5.NF.B.6

Which common factor is used to simplify 81 and 9?

• 1

• 4

• 8

• 9

What is the result of dividing 81 by 9?

• 9

• 10

• 8

• 1

Tags

CCSS.4.NBT.B.6

What is the greatest common factor between 8 and 40?

• 8

• 4

• 2

• 1

What is the final result of multiplying 9 by 5?

• 50

• 40

• 35

• 45

Tags

CCSS.3.OA.C.7

What is the final answer when 45/1 is simplified?

• 5

• 1

• 0

• 45

When can cross cancellation not be used?

• When the only common factor is 1

• When the fractions are already simplified

• When the denominators are the same

• When the numerators are the same

Tags

CCSS.3.OA.A.3