(-15)-(-4)

Let's evaluate: (-15) -(-4)
ⓘ Subtract a negative number by adding its opposite: the two minus signs become a plus: -(-4) = 4
(-15) + 4
ⓘ Start from -15 and move forward 4 on the number line, getting closer to zero: (-15) + 4 = -11
▶Result:   -11

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