Key Idea1 of 3
Finding the Missing Piece
Sometimes you know one part and need to find the other part that makes 5. If someone says 'I have 2 stickers and I need 5 total,' you have to figure out how many more they need. Think: 2 plus what equals 5? The answer is 3, because 2 plus 3 is 5. This is like solving a little puzzle!