It takes Carmen 10 minutes to finish a crossword puzzle and 5 minutes to finish a sudoku puzzle.  Over the weekend she solved 3 crossword puzzles and 8 sudoku puzzles.  How much time did she spend playing these games?
It takes 10 minutes to complete a crossword puzzle and she completed 3 for a total of 10*3 = 
<gadget id="calculator">10*3</gadget>
<output>30</output>
30 minutes.
It takes 5 minutes to complete a sudoku puzzle and she completed 8 for a total of 5*8 = 
<gadget id="calculator">5*8</gadget>
<output>40</output>
40 minutes.
She spent 30 minutes on crosswords and 40 minutes on sudoku for a total of 30+40 = 
<gadget id="calculator">30+40</gadget>
<output>70</output>
70 minutes.

<result>70</result>