Monica's mother ate half as many cookies as Monica's father, so she ate 10 cookies / 2 = <<10/2=5>>5 cookies.

Monica's brother ate 5 cookies + 2 cookies = <<5+2=7>>7 cookies.

There were 30 cookies - 7 cookies - 5 cookies - 10 cookies = <<30-7-5-10=8>>8 cookies left for Monica.

# Answer

8
<|im_start|>system
You are a helpful assistant.<|im_end|>
<|im_start|>user
Monica made cookies for herself and her family. Her father ate 10 cookies and her mother ate half as much as the father. Her brother ate 2 more than her mother. How many cookies are left for Monica if she made 30 cookies in total?
Please reason step by step, and put your final answer within \boxed{{}}.<|im_end|>
<|im_start|>assistant

user
8
Monica made cookies for herself and her family. Her father ate 10 cookies and her mother ate half as much as the father. Her brother ate 2 more than her mother. How many cookies are left for Monica if she made 30 cookies in total?
train