Buying Erasers (Solving one-step decimal equations: multiplication)

The video tutorial explains how to solve a real-world problem involving the purchase of erasers. Jillian buys erasers at $0.25 each, spending a total of $2.25. The problem is represented by the equation 0.25X = 2.25. The tutorial demonstrates solving for X by isolating the variable using division, resulting in X = 9. Thus, Jillian bought 9 erasers. The lesson focuses on solving one-step multiplication equations with decimals.

If each eraser costs $0.25 and Jillian spent $2.25, how many erasers did she purchase?

• 7

• 8

• 10

• 9

What is the first step in solving the equation 0.25X = 2.25?

• Add 0.25 to both sides

• Subtract 0.25 from both sides

• Divide both sides by 0.25

• Multiply both sides by 0.25

What operation is used to isolate the variable X in the equation 0.25X = 2.25?

• Division

• Subtraction

• Multiplication

• Addition

After solving the equation 0.25X = 2.25, what is the value of X?

• 9

• 10

• 8

• 7

What concept did you learn in this lesson?

• Solving equations with variables on both sides

• Solving equations with fractions

• Solving one-step multiplication equations with decimals

• Solving quadratic equations