Understanding Basic Arithmetic Operations

The video tutorial covers subtraction of positive and negative numbers, using number lines to represent sums and differences, and compares two methods for solving equations. It explains how subtraction can be viewed as adding the opposite and provides practical examples. The tutorial concludes with a discussion on proportionality and unit conversion.

What is the sum of 3 and an unknown number if the total is 8?

• 6

• 5

• 7

• 4

If May uses an arrow of -3, what unknown value does she need to reach 8?

• 11

• 5

• 8

• 3

How does Tyler solve the equation 8 minus a negative number?

• By dividing the number

• By adding the number

• By subtracting the number

• By multiplying the number

Which expression is equivalent to subtracting a negative number?

• Subtracting a positive number

• Adding a positive number

• Dividing by a positive number

• Multiplying by a negative number

What is the result of 9 minus 4?

• 3

• 5

• 7

• 6

If you pay $72 for a $59 bill, what percentage is the tip?

• 20%

• 15%

• 25%

• 22%

What is the equivalent addition equation for 30 minus an unknown number equals 40?

• 30 + x = 40

• 30 + 10 = x

• 30 - x = 40

• 30 - 10 = x

How do you rewrite the subtraction of a positive number as an addition equation?

• Subtract the opposite number

• Subtract the same number

• Add the opposite number

• Add the same number

What is the constant of proportionality if 1 kg equals 2.2 lb?

• 2.2

• 1.0

• 0.45

• 3.0

What is the result of adding a negative number to a positive number?

• Always zero

• Always negative

• Depends on the magnitude

• Always positive