His partner has been teaching for 40-10=<<40-10=30>>30 years

So together they have 40+30=<<40+30=70>>70 years of experience

# Answer

70
<|im_start|>system
You are a helpful assistant.<|im_end|>
<|im_start|>user
James spends 40 years teaching.  His partner has been teaching for 10 years less.  How long is their combined experience?
Please reason step by step, and put your final answer within \boxed{{}}.<|im_end|>
<|im_start|>assistant

user
70
James spends 40 years teaching.  His partner has been teaching for 10 years less.  How long is their combined experience?
train