5-6

Do you mean: - the arithmetic 5 − 6, or - problems 5–6 in a worksheet, or - something else (like an interval [5,6])? If you mean 5 − 6, the answer is -1. If you want step-by-step subtraction with negative results: 5 − 6 = -(6 − 5) = -1. Tell me the exact context (topic, worksheet, or subject), and I can tailor practice or explanations.