Exploring Adding and Subtracting Rational Numbers

This video tutorial covers the addition and subtraction of rational numbers, using a number line as a visual aid. It explains how to handle numbers with the same and different signs, introduces the concept of opposites and additive inverses, and demonstrates subtraction as adding the inverse. A real-world example involving stock prices is used to illustrate these concepts.

What was the total yard gain for the New York Giants after a 5-yard penalty and a 13-yard pass?

• 10 yards

• 15 yards

• 8 yards

• 5 yards

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CCSS.7.NS.A.1C

If you start at 8 on a number line and move 5 units to the left, where do you end up?

• 3

• 5

• 13

• 8

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CCSS.7.NS.A.1B

What is the result of adding -1 and -4 on a number line?

• -6

• -3

• -5

• -4

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CCSS.7.NS.A.1B

When adding rational numbers with the same sign, what should you do?

• Subtract their absolute values and keep the same sign

• Add their absolute values and keep the same sign

• Subtract their absolute values and change the sign

• Add their absolute values and change the sign

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CCSS.7.NS.A.1C

What is the result of adding 6 and -14?

• 8

• -20

• -8

• 20

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CCSS.7.NS.A.1C

What is the opposite of -4?

• 8

• 4

• 0

• -4

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CCSS.6.NS.C.6A

What is the sum of a number and its additive inverse?

• 0

• 1

• The number itself

• -1

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CCSS.7.NS.A.1B

What is the result of 9 minus 4?

• 6

• 7

• 5

• 8

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CCSS.2.OA.A.1

How can you rewrite 8 - 15 using additive inverses?

• 8 + 15

• 8 + (-15)

• 8 - (-15)

• 8 - 15

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CCSS.7.NS.A.1B

If a stock price went from $52.08 to $70.87, what is the change in price?

• $20.79

• $18.79

• $17.79

• $19.79

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CCSS.6.NS.B.3