Adding and Subtracting Rational Numbers in Real Life

This video tutorial teaches how to add and subtract rational numbers in real-life situations. It begins with an introduction to rational numbers and their importance in everyday scenarios, especially in financial contexts. The lesson includes brainstorming positive and negative indicators, followed by real-life examples of both. The tutorial then focuses on solving word problems using rational numbers, with detailed examples involving lake water levels and loan repayment. By the end, students should be able to apply rational number operations to various real-life situations.

Why is it important to understand rational number operations in real life?

• Because we always deal with integers.

• Because it is only useful in academic settings.

• Because rational numbers are rarely used.

• Because real-life situations often involve rational numbers.

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CCSS.7.NS.A.1D

Which term indicates adding money to your bank account?

• Withdrawal

• Deposit

• Deduction

• Debt

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CCSS.7.NS.A.1B

What is the term for the money you earn from your job?

• Salary

• Loan

• Debt

• Expense

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CCSS.RI.5.5

CCSS.RI.6.5

CCSS.RI.7.5

CCSS.RI.8.5

CCSS.RI.9-10.5

If your income is greater than your expenses, what do you have?

• Debt

• Loss

• Profit

• Deduction

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CCSS.6.NS.C.7C

What is the opposite of a deposit?

• Withdrawal

• Debt

• Loan

• Expense

What does it mean if you are in debt?

• You have equal income and expenses.

• You have more money than you owe.

• You owe more money than you have.

• You have no money.

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CCSS.RI.6.4

CCSS.RI.7.4

CCSS.RI.8.4

CCSS.RI.9-10.4

CCSS.RI.9-10.4

In the first word problem, what operation is used to find the total drop in water level?

• Addition of two positive numbers

• Subtraction of two positive numbers

• Addition of two negative numbers

• Subtraction of two negative numbers

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CCSS.7.NS.A.1C

What is the final answer for the first word problem involving the lake's water level?

• Negative 3 and 5/8 feet

• Negative 2 and 1/4 feet

• Negative 1 and 3/8 feet

• Negative 4 feet

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CCSS.7.NS.A.1C

In the second word problem, what is the initial amount Jonathan borrowed?

• $188.56

• $611.44

• $800

• $1000

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CCSS.7.NS.A.3

How much does Jonathan still owe his grandparents after paying back $188.56?

• $1000

• $611.44

• $188.56

• $800

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CCSS.7.EE.B.3