Question

(− 3) (− 4) (12) (− 1) = ............

Answer 1

(− 3) (− 4) (12) (− 1) = (− 3) (− 4) (− 12) [ ∵ (12) (− 1) = (− 12)]
= (− 3) (48) [ ∵ (− 4) (− 12) = 48]
= − (3 $\text{×}$ 48)
= − 144
Hence, (− 3) (− 4) (12) (− 1) = − 144.