Task 1: Maths: Cookies

In our class meet we posed the problem:

Lisa baked a delicious batch of cookies. She put them on a plate. Lisa gave some of the cookies to her brother. Then a friend came to visit and she gave some to her friend.

How many cookies might Lisa have started with?

How many cookies might she have given to her brother?

How many cookies might she have given to her friend?

How many cookies might be left on the plate?

Have a go at completing this task yourself.

Extend yourself by proving your answers and showing your thinking.