Solving Real World Problems with Rational Numbers

The video tutorial focuses on adding and subtracting rational numbers, particularly in real-world scenarios. It introduces keywords that indicate addition or subtraction in word problems and outlines a three-step strategy for solving these problems. The tutorial includes five examples: calculating elevation changes, analyzing a checking account, determining temperature changes, tracking money given and lost, and calculating remaining money after expenses. Each example demonstrates the application of rational number operations in practical situations.

What is the first step in solving word problems involving rational numbers?

• Ignore the units

• Understand the problem

• Guess the answer

• Start solving immediately

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CCSS.7.RP.A.3

Which of the following words indicates addition?

• Decrease

• Difference

• Withdraw

• Deposit

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CCSS.5.NBT.B.7

In the first example, what does the word 'descended' indicate?

• Addition

• Multiplication

• Subtraction

• Division

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CCSS.RI.7.4

CCSS.RI.8.4

CCSS.RI.9-10.4

CCSS.RL.8.4

CCSS.RL.9-10.4

What was Michelle's final elevation in the first example?

• 625 meters

• 125 meters

• 300 meters

• 500 meters

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CCSS.7.NS.A.1C

In the second example, how much did Tony spend at the gas station?

• $11.28

• $22.13

• $13.43

• $4.96

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CCSS.6.NS.B.3

Does Tony have enough money to buy the grip tape?

• Maybe

• No

• Yes

• Not enough information

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CCSS.7.EE.B.3

In Wisconsin, if the morning temperature was -15.15°F and it decreased by 5 1/3 degrees, what was the final temperature?

• -15°F

• -25.33°F

• -20.33°F

• -10°F

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CCSS.7.NS.A.1C

How much money did Jenna's dad give her in total?

• $20.25

• $12

• $5.25

• $11.25

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CCSS.6.NS.B.3

How much money did Jenna lose in total?

• $11.25

• $5.25

• $20.25

• $12

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CCSS.7.EE.B.3

How much money does Kaylee have left after her transactions?

• $170.45

• $59.99

• $120.45

• $110.46

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CCSS.6.NS.B.3