Mr Toshio lent out11 rulers at the beginning of class, collected 4 rulers in the middle of class, and gave out 7 at the end of class. He had 18 at the end of the day. How many rulers did he start with. what is the first step to solving this problem?

Respuesta :

11-4+7+18

11-4=7+7=14+18=32

He started class with 32 rulers


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