For the second month, Sam earned $200 + $150 = $<<200+150=350>>350.

So, he earned a total of $200 +$350 = $<<200+350=550>>550 for the first two months.

Therefore, he spent $550/$10 = <<550/10=55>>55 hours on math tutoring for the first two months

# Answer

55
<|im_start|>system
You are a helpful assistant.<|im_end|>
<|im_start|>user
Sam earns $10 an hour on Math tutoring. For the first month, he earned $200; and for the second month, he earned $150 more than the first month. How many hours did he spend on tutoring for two months?
Please reason step by step, and put your final answer within \boxed{{}}.<|im_end|>
<|im_start|>assistant

user
55
Sam earns $10 an hour on Math tutoring. For the first month, he earned $200; and for the second month, he earned $150 more than the first month. How many hours did he spend on tutoring for two months?
train