Tim gave 40 / 2 = <<40/2=20>>20 balls to Robert.

Robert now has 25 + 20 = <<25+20=45>>45 balls.

# Answer

45
<|im_start|>system
You are a helpful assistant.<|im_end|>
<|im_start|>user
Robert had 25 balls. Tim gave him half of his 40 balls. How many balls does Robert have now?
Please reason step by step, and put your final answer within \boxed{{}}.<|im_end|>
<|im_start|>assistant

user
45
Robert had 25 balls. Tim gave him half of his 40 balls. How many balls does Robert have now?
train