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? Let's answer step by step:
In January and February, Benny added 19 + 19 = $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 = $8 in March. The answer: 8.