Bob takes 4 apples and sarah eat 2 of his apples how many apples does bob have now ?

4-2 = 2
He started with 4 and went down 2.  So he has 2 left.

This question was hard. But I figured It out So I learned 4-2=6-4=2 So I had got my answer by doing that.

You have 2 sides that are 2 cms and you have 6 sides that are 1/2 cm and you have 4 sides that are 1 cm. the smallest sides are 1/2 the medium sized sides are 1 and the smallest are 1/2. so to find the perimeter you have to add them all up together so your answer will be 11 cm's