Answer: -1, -2, -3, -5
Step-by-step explanation: subtracting the values;
6 - 8 = -2.
7 - 12 = -5.
1 -4 = -3.
0 -1 = -1.
Answers; -2, -5, -3 and -1.
Arranging them in order: -1, -2, -3 and -5
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