Question

Daniel needs 65 feet of oak boards and 100 feet of pine boards for a building project. Each board will be cut into 5 ft lengths. Which explanation correctly tells how to calculate how many more pine boards than oak boards Daniel will have?

A.
Step 1 Multiply: 100 × 5.
Step 2 Multiply: 65 × 5.
Step 3 Subtract the two products.


B.
Step 1 Multiply: 100 × 5.
Step 2 Multiply: 65 × 5.
Step 3 Add the two products.


C.
Step 1 Divide: 100 ÷ 5.
Step 2 Divide: 65 ÷ 5.
Step 3 Subtract the two quotients.


D.
Step 1 Divide: 100 ÷ 5.
Step 2 Divide: 65 ÷ 5.
Step 3 Add the two quotients.

Answer 1

Each piece of board is being cut into 5, so therefore for every one piece of board there will be 5 pieces.
So for pine you would do 100x5 and oak you would do 65x5
That would be your step 1 and 2 which eliminates C and D.
The question asks to find the difference between the two. Which means you need to subtract them to find the difference between the two numbers.

Option A would be correct.
Hope this helps! :)