Mastering Multiplication and Division of Rational Numbers

What is the first step in finding the average of a set of numbers?

• Subtract the smallest number from the largest

• Add all the numbers together

• Multiply all the numbers

• Divide the largest number by the smallest

Tags

CCSS.7.EE.B.3

When adding fractions with the same denominator, what happens to the denominator?

• It changes to the sum of the denominators

• It remains the same

• It changes to the product of the denominators

• It becomes zero

Tags

CCSS.4.NF.B.3D

CCSS.4.NF.B.3C

What is the result of dividing -8 by 4?

• 2

• -8

• -1/2

• -2

Tags

CCSS.7.NS.A.2B

CCSS.7.NS.A.2A

What is the average weekly height change if the total change over four weeks is -8?

• -1/2

• -8

• 2

• -2

Tags

CCSS.7.EE.B.3

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

• Subtract the numerator from the whole number

• Divide the numerator by the denominator

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

• Multiply the numerator by the whole number

What is the result of dividing -24/5 by -4/5?

• -6

• -5

• 5

• 6

Tags

CCSS.7.NS.A.2B

How many pieces of wood did Mitch cut if the total length change is -4 4/5 feet and each piece changes the length by -0.8 feet?

• 5

• 8

• 6

• 7

Tags

CCSS.7.NS.A.2B

CCSS.7.NS.A.2A

What is the result of multiplying -3/4 by 7?

• -21/4

• 3/28

• 21/4

• -3/28

Tags

CCSS.7.NS.A.2A

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

• Add the numerator to the denominator

• Multiply the numerator by the denominator

• Subtract the denominator from the numerator

• Divide the numerator by the denominator and use the quotient as the whole number

What is the change in the amount of shore after 7 years if the average yearly change is -3/4 foot?

• 21/4

• -21/4

• -5 1/4

• 5 1/4

Tags

CCSS.7.RP.A.3