A dime has the same value as 10 pennies and a nickel has the same value as 5 pennies. How many pennies will Grace have by exchanging her 10 dimes and 10 nickels?
Grace will have 10 x 10 = 
<gadget id="calculator">10*10</gadget>
<output>100</output>
100 pennies from her dimes.
She will have 10 x 5 = 
<gadget id="calculator">10*5</gadget>
<output>50</output>
50 pennies from her nickels.
Therefore, she will have a total of 100 + 50 = 
<gadget id="calculator">100+50</gadget>
<output>150</output>
150 pennies.

<result>150</result>