1. Which property is this 1 × 4 = 4?
Multiplicative identity property.
2. Which property is this 2 × 3 × 5 = 5 × 3 × 2?
Commutative property of multiplication.
3. Which property is this (9 × 7) × 4 = 9 × (7 × 4)?
Associative property of multiplication.
4. Which property is this 8 × 0 = 0?
Multiplication property of zero.
5. Which property is this 4(1 + 7 - 6) = 4 × 1 + 4 × 7 - 4 × 6?
Distributive property of multiplication over addition and subtraction.