Question

Coffee Shop PricesCup CostSmall $2Regular $4Large $5David and Jon are placing coffee orders for their friends.David orders 10 large cups of coffee. Jon orders 4 fewer large cups than David. Jon pays for his orders with a $50 bill.Jon wants to know how much he spent on coffee.1. What is a good plan to find the amount Jon spent on coffee?2. Find how much Jon spent on coffee. Show the equations you used.3. Jamie says the equation 0 x $2 = $0 shows the amount Jon spent on small cups of coffee. Is he correct? Explain.4. Would David have enough money if he paid for his order with a $20 bill? Explain.3rd grade student

Answer 1

We are given the following details:

Small cup of Coffee = $2

Regular cup of Coffee = $4

Large cup of Coffee = $5

1.

Jon orders 4 fewer large cups than David as shown below. The amount he spent is shown below:

$\begin{gathered} Jon=(10-4)\text{ }large\text{ }cups \\ Jon=6\text{ }large\text{ }cups \\ Jon=6\times5 \\ Jon=\text{\ }30 \end{gathered}$

This means that Jon spent $30 on coffee

2.

The equation is shown below:

$\begin{gathered} Jon=(10-6)\times\text{\ }5 \\ Jon=4\times\text{\ }5 \end{gathered}$

3.

Jon bought zero small cups of coffee. This is represented as:

$\begin{gathered} =0\times\text{\ }2 \\ =\text{ \ 0} \end{gathered}$

Hence, Jamie is correct

4.

David ordered 10 large cups of coffee as shown below:

$\begin{gathered} David=10\times5 \\ David=\text{\ }50 \end{gathered}$

If David paid for his order with a $20 bill, we have:

$\begin{gathered} =\text{\ (}20-50) \\ =-\text{\ }30 \end{gathered}$

That implies that $20 cannot cover David's order, he'd still be having a deficit of $30