state the sign of the products,without actually multiplying (i) (-3)×6×(-2)×(-1) (ii) 1×(-9)×6×(-2) (iii) 0×(-3)×8×3 (iv) (-1)×1×(-1)×(-1) with explanation
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(-3) × 6 × (-2) × (-1)
⇒ (-18) × (-2) × (-1)
⇒ 36 × (-1)
⇒ (-36)
1 × (-9) × 6 × (-2)
⇒ 9 × 6 × (-2)
⇒ 54 × (-2)
⇒ (-108)
0 × (-3) × 8 × 3
⇒ 0 (Any integer when multiplied with 0 gives 0)
(-1) × 1 × (-1) × (-1)
⇒ (-1) × (-1) × (-1)
⇒ 1 × (-1)
⇒ (-1)
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