Cheryl ate 7 m&m's after lunch. She ate 5 m&m's after dinner, and she gave some to her sister. If Cheryl had 25 m&m's at the beginning, how many did she give to her sister?
Cheryl at 7 + 5 = 
<gadget id="calculator">7+5</gadget>
<output>12</output>
12 m&amp;m's.
She gave 25 - 12 = 
<gadget id="calculator">25-12</gadget>
<output>13</output>
13 m&amp;m's to her sister.

<result>13</result>