The factors of 868 are: 1 2 4 7 14 28 31 62 124 217 434 868
2 subtracted by 3 = -1
94
434
2, 4, and 8
There are infinitely many answers: 1*1*1*868 -1*-1*1*868 -1*-1*-1*-868 -1*1*1*-868 1*1*2*434 and all the variations that go with the signs then 0.1*10*1*868 and all its variants and 0.1*0.1*100*868 etc and 0.2*1*1*4340 etc and so on and on and on.
Division by zero is undefined.
0 -2 = -2
Answer: 'm' times. Examples: If m=2, Then m2 = (2x2) = 4 -> 4-2-2 = 0 (So subtracted TWICE) If m=4 Then m2 = (4x4) = 16 -> 16-4-4-4-4 = 0 (So subtracted FOUR TIMES) This works no matter how large the number is!
1 subtracted by 3 and one half = -2
-2 is the answer
2 and 2/3