Benny has bought a new piggy bank and wants to start saving money. In January he adds $19, then adds the same amount in February. By the end of March, he has $46. How many dollars did he add to the piggy bank in March?
In January and February, Benny added 19 + 19 = $
<gadget id="calculator">19+19</gadget>
<output>38</output>
38 to the piggy bank.
Calculating the difference between this and the total he has at the end of March shows that he saved 46 - 38 = $
<gadget id="calculator">46-38</gadget>
<output>8</output>
8 in March.

<result>8</result>