Isaac is buying ingredients to bake 4 batches of chocolate chip walnut cookies, and each batch requires 1 bag each of chocolate chips and walnuts. His receipt shows a total of $17.92. He remembers that the chocolate chips were $2.59 per bag, but he can't remember how much each bag of walnuts costs.

Question

How can Isaac determine the cost per bag of walnuts?
Match each step of the arithmetic solution with the correct description

Answer 1

To determine the cost per bag of walnuts, we can break the problem down into steps. Here’s how Isaac can find the cost per bag of walnuts, along with descriptions for each step.

Step 1: Calculate the total cost of chocolate chips.

• Description: Isaac needs to find out how much he spent on chocolate chips by multiplying the price per bag by the number of batches (since each batch requires one bag).
  • Calculation: \( 4 \text{ batches} \times $2.59/\text{bag} = $10.36 \)

Step 2: Determine the total cost spent on walnuts.

• Description: To find out how much he spent on walnuts, Isaac needs to subtract the total cost of chocolate chips from the total amount on the receipt.
  • Calculation: \( $17.92 - $10.36 = $7.56 \)

Step 3: Calculate the cost per bag of walnuts.

• Description: Since he made 4 batches of cookies and bought 4 bags of walnuts, he divides the total amount spent on walnuts by the number of bags to find the price per bag.
  • Calculation: \( $7.56 \div 4 \text{ bags} = $1.89/\text{bag} \)

Putting it all together, Isaac can conclude:

1. The total cost for chocolate chips is $10.36.
2. The total spent on walnuts is $7.56.
3. The cost per bag of walnuts is $1.89.

This structured approach allows Isaac to find the cost of the walnuts accurately.