Question

I need help on number 2 pls

Answer 1

i know that the value of the unshaded part is probably 6,because the entire area is 45.5x9 is 45,and 3=6 makes up 9,so the value of the unshaded part is 6.I dont really understand part b though.

Answer 2

(2-3) x2=-2  -2x4 -( 2 - 13) 11.5