Out of 100 fifth grade students, 10 can neither play football nor table tennis, 75 can play football, 83 can play table tennis, how many can play both football and table tennis ?
五年级学生100人中，有10人既不会踢足球，也不会打乒乓球，有75人会踢足球，有83人会打乒乓球，有多少人既会踢足球又会打乒乓球？
<gadget id="calculator">100 - 10</gadget>
<output>90</output>

<gadget id="calculator">83 - 90</gadget>
<output>-7</output>

<gadget id="calculator">75 + (-7)</gadget>
<output>68</output>

<result>68</result>