Adding Positive and Negative Numbers

The video tutorial covers adding rational numbers, focusing on signed numbers and the order of operations. It includes examples of adding integers, decimals, and fractions, emphasizing the importance of determining the sign based on magnitude. The lesson concludes with a review and homework instructions.

What is the first step in solving mathematical expressions according to the order of operations?

• Multiplication

• Subtraction

• Parentheses

• Addition

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

• Ignore the signs

• Add the numbers directly

• Find the sum of the absolute values

• Find the difference between the numbers

What is the result of adding -35 and 35?

• 35

• 70

• 0

• -70

How do you determine the sign of the result when adding a negative and a positive decimal?

• By the sign of the first number

• By the larger magnitude

• By the sign of the last number

• By the smaller magnitude

What is the result of adding -0.15 and -0.85?

• -0.7

• 0

• 1

• -1

When adding fractions, what is the first step if they have different denominators?

• Add the numerators

• Find a common denominator

• Subtract the numerators

• Multiply the denominators

What is the result of adding 1/2 and -3/4?

• -1/2

• 1/2

• -1/4

• 1/4

What determines the sign of the result when adding a positive and a negative number?

• The magnitude of the larger number

• The magnitude of the smaller number

• The sign of the last number

• The sign of the first number

What is the result of adding -100 and 82?

• 82

• 18

• -182

• -18

Where can you find the practice problems for this lesson?

• In the library

• In McGraw Hill

• On the school website

• In the textbook