1. **State the problem:** We have a tape diagram with three equal parts, each labeled 9, and the total length is 27. 2. **Write the equation using addition:** Since the total is the sum of the three parts, the equation is $$9 + 9 + 9 = 27$$. 3. **Write the equation using subtraction:** If we start with the total and subtract two parts, we get the remaining part: $$27 - 9 - 9 = 9$$. 4. **Write the equation using multiplication:** Since there are three equal parts of length 9, multiply 9 by 3: $$3 \times 9 = 27$$. 5. **Write the equation using division:** To find the length of one part, divide the total by 3: $$\frac{27}{3} = 9$$. **Final answers:** - Addition: $$9 + 9 + 9 = 27$$ - Subtraction: $$27 - 9 - 9 = 9$$ - Multiplication: $$3 \times 9 = 27$$ - Division: $$\frac{27}{3} = 9$$