1. The problem asks to complete the equations using properties of addition and multiplication. 2. For part A: The equation is $$211 + 327 = 327 + \underline{\quad}$$. 3. We use the commutative property of addition, which states that $$a + b = b + a$$. 4. Therefore, $$211 + 327 = 327 + 211$$. 5. For part B: The equation is $$803 \times 593 = 593 \times \underline{\quad}$$. 6. We use the commutative property of multiplication, which states that $$a \times b = b \times a$$. 7. Therefore, $$803 \times 593 = 593 \times 803$$. 8. For part C: The equation is $$3935 \times \underline{\quad} = 0$$. 9. We use the zero property of multiplication, which states that any number multiplied by zero equals zero. 10. Therefore, $$3935 \times 0 = 0$$. Final answers: A. 211 B. 803 C. 0