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

step one:
step 2 :
choose to steps
subtract 2.59 from 4.48
subtract 2.59 from 71.68
divide 17.92 by 4
add 2.59 to 4.48
multiply 17.92 by 4

Answer 1

To determine the cost per bag of walnuts, Isaac can follow these steps:

1. Step One: Divide the total cost of ingredients by the number of batches to find the cost per batch.

   • Correct description: Divide 17.92 by 4

2. Step Two: Subtract the cost of the chocolate chips from the cost per batch to find the cost of the walnuts per batch.

   • Correct description: Subtract 2.59 from the result obtained in Step One (which would be the total cost per batch).

So, here is how the steps matched with their descriptions would look:

• Step one: Divide 17.92 by 4
• Step two: Subtract 2.59 from the result of Step One (which will give the cost of walnuts per batch).

If he finds that the cost of four batches is $4.48 (which is $17.92 divided by 4), then subtracting the cost of chocolate chips (2.59) from that amount will give him the total cost for the walnuts for four batches; thus he can then divide that total by 4 to find the cost per bag of walnuts.

So, as a summary:

1. Divide: 17.92 by 4
2. Subtract: (Total cost per batch from Step One) - 2.59

If you want to be explicit about the additional calculations, after that: 3. Take the result from Step Two and divide by 4 to get the cost per bag of walnuts.