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 = $<<19+19=38>>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 = $<<46-38=8>>8 in March.
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