Exploring Rational Expressions: Addition and Subtraction

The video tutorial explains the concept of absolute value as the distance of a number from zero, emphasizing its always positive nature. It covers how to add and subtract integers using absolute values, including the keep-change-change method for subtraction. The tutorial also discusses the importance of order of operations when dealing with grouping symbols and provides rules for multiplying and dividing integers, highlighting the sign changes involved.

What is the absolute value of a number?

• The number's distance from infinity

• The number's distance from one

• The number's distance from zero

• The number itself

What is the absolute value of -21?

• 21

• 0

• -1

• -21

When adding a positive and a negative integer, what should you do?

• Divide the absolute values

• Multiply the absolute values

• Subtract the absolute values

• Add the absolute values

What is the result of 33 + (-10)?

• -43

• 43

• -23

• 23

Why is the result of 5 + (-18) negative?

• Because 5 is positive

• Because 5 is smaller than -18

• Because -18 is positive

• Because -18 has a greater absolute value

What is the result of subtracting -15 from 4?

• -19

• 19

• 11

• -11

What is the 'keep-change-change' method used for?

• Division

• Multiplication

• Addition

• Subtraction

What is the result of -78 + 214?

• 292

• -292

• 136

• -136

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

• Undefined

• Zero

• Negative

• Positive

What is the result of dividing a negative number by another negative number?

• Positive

• Negative

• Undefined

• Zero