James spends 40 years teaching.  His partner has been teaching for 10 years less.  How long is their combined experience? Let's think step by step and output the final answer after "####".
user
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
#### 70
James spends 40 years teaching.  His partner has been teaching for 10 years less.  How long is their combined experience?
train