+ + + + Let's Try! 1. Combine + + + + and Since the first 4 tiles are positive and the next 5 tiles are also positive. Therefore they will appea In symbol: 4 + 5 = 9 2. Combine 01 and OOD Since the first 3 tiles are negative and the next 4 tiles are also negative. Therefore they will appear as 010000 In symbol: (-3) + (-4) = -7 8​