Fight 10+10 amazing digit never give up to 10

Fight 10 Don't be stupid crying by yourself! The rules of the game: 1, time: 60 seconds. 2, arbitrary square Numbers together can eliminate a corresponding squares equal to 10. 3, eliminating a square can get one point. 4, every time get 10, reward a second time. primary students are good at arithmetic addition,would you? for example: 1+9=10 2+8=10 1+2+7=10 2+3+5=10 1+2+3+4=10 2+2+2+4=10 1+1+2+2+4=10 ……