5 5 5 5 - 3 - 3 - 3 - 3 Draw lines according to the given numbers and find the difference. a b c d 8 6 9 5 - 2 - 1 - 6 - 8 e f g h 8 7 3 4 - 2 - 2 - 3 - 2 i j k l 6 9 2 7 - 2 - 4 - 6 - 4 42