Fill in the blanks with the numbers 1,2,3,4,5,6,7,8,9, () - () = () () 1. Each number can only be filled in once and cannot be repeated

Fill in the blanks with the numbers 1,2,3,4,5,6,7,8,9, () - () = () () 1. Each number can only be filled in once and cannot be repeated

648-257=391 648-297=351 648-357=291 648-397=251 675-284=391 675-294=381
675-384=291 675-394=281 837-246=591 837-296=541 837-546=291 837-596=241
864-273=591 864-293=571 864-573=291 864-593=271 927-346=581 927-386=541
927-546=381 927-586=341 954-273=681 954-283=671 954-673=281 954-683=271

4,6,9,8,7,1,3,10,2,5 what is the fourth number from 6? Does it include 6 itself?

7
Because starting from 6, it starts from 6

）+() = () + () = () + () fill in the number 0 1 2 3 4 5, each number

0+5=1+4=2+3

Fill in the blanks according to the rules

Each number is 2 less than the one in front of it
12、 （10）、8、（6）、（4）、（2）.