Find the law of primary school mathematics problems and fill in the numbers in the order of [] [] 45 56 78 [] [].
Because 56-45= 1 1 and 78-56=22, there is a difference of 1 1 between every two numbers, and then there is a difference of 22, so the first one of 45 is: 45-22 = 23; 23 The previous one is: 23-11=12; The previous one of 12 is: 12-22= negative10; The last one after 78 is: 78+11= 89; The last one after 89 is: 89+22= 1 1 1. Then: ...