Nancy has a bag containing 22 tortilla chips. She gives 7 tortilla chips to her brother and 5 tortilla chips to her sister, keeping the rest for herself. How many did Nancy keep for herself?
She gave away 7+5=
<gadget id="calculator">7+5</gadget>
<output>12</output>
12 chips.
Then she kept 22-12=
<gadget id="calculator">22-12</gadget>
<output>10</output>
10.

<result>10</result>