You have 2+2 in each 2 there are 1's so
2=(1+1) 2=(1+1) =4
4=1+1+1+1
2+2=4
think of 2's as 1's when adding did you know 2x2= 4 as well.
Answer:

Hope this helps at all. :)
$2,620
$0,750
$0,630
$0,050
$0,090
+$0,425
=$4,665
30 is 20% of the number 150
It has to be greater than the difference between the two sides, so 97-14=83