You collect balls. Suppose you start out with 106. Your sister gives you another 17 balls. How many balls do you have at the end? Choose the correct choice:  A) 106  B) 17  C) 321  D) 123  E) 132
Solution   Start with 106 balls.   Sister gives you 17 balls:   106 + 17= 
<gadget id="calculator">  106 + 17</gadget>
<output>123</output>
123 balls.   So you have 123 at the end.   Correct answer: 123
<result>D</result>
You collect balls. Suppose you start out with 106. Your sister gives you another 17 balls. How many balls do you have at the end?