Mastering Multiplication of Rational Numbers

The video tutorial covers the multiplication of rational numbers, starting with a review of rules for multiplying integers. It provides examples involving real-life scenarios such as elevation changes and bank account charges, demonstrating how to multiply decimals, fractions, and negative numbers. The tutorial concludes with a review of multiplication rules for rational numbers.

What is the result of multiplying a positive number by a negative number?

• Zero

• Positive

• Undefined

• Negative

Tags

CCSS.7.NS.A.2A

CCSS.7.NS.A.2B

What is the result of multiplying a negative number by a positive number?

• Zero

• Positive

• Negative

• Undefined

Tags

CCSS.7.NS.A.2A

CCSS.7.NS.A.2B

If Angelo's change in elevation is -1.2 meters, what is Tina's change in elevation if it is 3.5 times Angelo's?

• 4.2 meters

• 3.5 meters

• -4.2 meters

• -3.5 meters

Tags

CCSS.7.EE.B.3

Sasha descends 2/3 of a mile four times. What is her total change in elevation?

• -2 2/3 miles

• -8/3 miles

• 8/3 miles

• 2 2/3 miles

Tags

CCSS.7.EE.B.3

If a hiker descends 2/3 of a mile each time, how far will they have descended after 4 descents?

• 2 2/3 miles

• -4 miles

• -2 2/3 miles

• 4 miles

Tags

CCSS.7.NS.A.2A

CCSS.7.NS.A.2B

Megan's bank account is charged $9.95 per month. What is the total charge after 3.6 months?

• $29.85

• -$29.85

• $35.82

• -$35.82

Tags

CCSS.7.NS.A.2A

How do you represent a monthly charge of $9.95 in a bank account?

• 0

• -9.95

• -0.95

• 9.95

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CCSS.6.NS.C.5

What is the product of -0.3 and 11/30?

• -0.11

• 0.11

• -0.36

• 0.36

Tags

CCSS.7.NS.A.2A

What is the product of -0.3 and 11/30 in decimal form?

• -0.11

• 0.36

• 0.11

• -0.36

Tags

CCSS.7.NS.A.2A

What is the product of -2.5 and -0.7?

• 1.75

• 2.5

• -1.75

• -2.5

Tags

CCSS.7.NS.A.2A