Angelina ate 1/2 * 100 = <<1/2*100=50>>50 cookies.
She gave 3/10 * 100 = <<3/10*100=30>>30 cookies.
So, the total number of cookies left over is 100 - 50 - 30 = <<100-50-30=20>>20 cookies. Answer: \boxed{20}.
Angelina baked 100 cookies she ate half of the cookies and gave 3/10 of the cookies how many cookies were left over
1 answer