Understanding Basic Arithmetic Operations

In this video tutorial, Professor Ângela explains how to perform addition and subtraction with integers. She provides three examples, demonstrating different methods to solve expressions involving negative and positive numbers. The video covers the use of parentheses, the concept of debt and credit, and the rule of signs. The tutorial concludes with a call to action for viewers to subscribe for more educational content.

What does a negative sign in front of a number indicate?

• A positive number

• Something you owe

• Something you have

• A multiplication operation

In the expression -10 + 4 - 8, what is the result after combining the debts?

• -14

• -10

• -4

• -18

After combining -18 and 4 in the expression -10 + 4 - 8, what is the final result?

• -4

• -10

• -14

• 0

In the expression 12 + (-7) + 15, what should be solved first?

• 12 + (-7) + 15

• (-7) + 15

• 12 + (-7)

• 12 + 15

What is the result of (-7) + 15?

• 8

• -8

• 22

• -22

What is the final result of the expression 12 + 8?

• 24

• 4

• 20

• 16

In the expression -8 + (-10 + 4 - 10) + 2, what is the result of the inner parentheses?

• -16

• -6

• -10

• -4

What is the result of -8 + (-6) + 2?

• -14

• -8

• -12

• -10

What is the result of -8 + 8?

• 0

• -16

• -8

• 8

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