Question
(-3)(-4)(12)(-1) = ............
✓
Answer
(-3)(-4)(12)(-1) = (-3)(-4)(-12) [$\because$ (12)(-1) = (-12)]
= (-3)(48) [$\because$ (-4)(-12) = 48]
= -(3 × 48)
= -144
Hence, (-3)(-4)(12)(-1) = -144
= (-3)(48) [$\because$ (-4)(-12) = 48]
= -(3 × 48)
= -144
Hence, (-3)(-4)(12)(-1) = -144
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