第一周第3题的答案是这样的:
Fact 1: The pirate puzzle has 50 pieces
Fact 2: The pirate puzzle has 20 pieces less than the car puzzle
So we’ll have to take away 20 pieces from the pirate puzzle to find out how many pieces are in
the car puzzle.
Write the solution
(C) : 50 – 20 = 30 pieces
The car puzzle has 30 pieces.