Mastering Decimal Word Problems with Positive and Negative Values

The video tutorial covers multiplying positive and negative decimals through word problems. It includes examples such as calculating temperature drop over hours, stock value decrease, and bird height gain. Each problem is solved step-by-step, demonstrating the multiplication of decimals and the effect of positive and negative signs on the results.

What is the first step in solving a word problem involving multiplying positive and negative decimals?

• Guess the answer

• Define the variables

• Add the numbers

• Divide the numbers

If the temperature drops 4.2 degrees per hour, how much will it drop in 7 hours?

• -29.4 degrees

• 29.4 degrees

• -28.4 degrees

• 28.4 degrees

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

• Positive

• Negative

• Undefined

• Zero

What variable is used to represent the change in value of the stock?

• C

• H

• T

• D

If a stock loses $2.73 per hour, what is the total loss after 5 hours?

• $13.65

• -$13.65

• $12.65

• -$12.65

What is the first step in solving the stock value decrease problem?

• Divide the numbers

• Guess the answer

• Define the variable

• Add the numbers

How many decimal places should you move back when multiplying 2.73 by 5?

• Three

• Two

• Four

• One

If a bird gains 23.6 feet per minute, how much height does it gain in 7 minutes?

• 165.2 feet

• 164.2 feet

• 167.2 feet

• 166.2 feet

What variable is used to represent the height gained by the bird?

• D

• T

• C

• H

What is the result of multiplying two positive numbers?

• Negative

• Positive

• Zero

• Undefined