Simple class enterprise

Worked solution

1. 1

   Count the bookmarks being made.

   $3\text{bookmarks}$

   Each of the three bookmarks needs its own materials.

2. 2

   Add one dollar for each bookmark.

   $1+1+1=3$

   Materials cost one dollar per bookmark.

3. 3

   State the materials cost.

   $3\text{dollars}$

   This total covers materials for all three bookmarks.

Worked solution

1. 1

   Start with the money received.

   $6\text{dollars}$

   Selling the bookmarks brought six dollars into the class fund.

2. 2

   Cover the money spent making them.

   $6-3=3$

   Three of the six dollars replace the materials cost.

3. 3

   Name what remains.

   $3\text{dollars}$

   The making cost has already been covered, leaving three dollars.