Lesson 4

Select all the equations that describe each situation and then find the solution.

1. Kiran’s backpack weighs 3 pounds less than Clare’s backpack. Clare’s backpack weighs 14 pounds. How much does Kiran’s backpack weigh?

   • \(x+3=14\)

   • \(3x=14\)

   • \(x = 14 -3\)

   • \(x = 14 \div 3\)

2. Each notebook contains 60 sheets of paper. Andre has 5 notebooks. How many sheets of paper do Andre’s notebooks contain?

   • \(y = 60 \div 5\)

   • \( y = 5 \boldcdot 60\)

   • \(\frac{y}{5} = 60\)

   • \(5y = 60\)

Solve each equation.

1. \(2x = 5\)
2. \(y + 1.8 = 14.7\)
3. \(6 = \frac{1}{2} z\)
4. \(3\frac{1}{4} = \frac{1}{2} + w\)
5. \(2.5t = 10\)

For each equation, draw a tape diagram that represents the equation.

1. \(3\boldcdot x = 18\)
2. \(3+x=18\)
3. \(17 - 6 = x\)

Find each product.

For a science experiment, students need to find 25% of 60 grams.

• Jada says, “I can find this by calculating \(\frac{1}{4}\) of 60.”
• Andre says, “25% of 60 means \(\frac{25}{100} \boldcdot 60\).”

Do you agree with either of them? Explain your reasoning.