Mark had 10 pieces of fruit to eat in school this week. On Friday, he decided to keep 2 pieces of fruit for next week. He then brings the remaining 3 pieces of fruit to school for the day. How many pieces of fruit did Mark eat in the first four days of the week?
Only 10 - 2 = 
<gadget id="calculator">10-2</gadget>
<output>8</output>
8 pieces of fruit were eaten this week.
Subtracting Friday's snacks shows Mark ate 8 - 3 = 
<gadget id="calculator">8-3</gadget>
<output>5</output>
5 pieces of fruit in the first four days of the week.

<result>5</result>