Using the nunbers 1-9, form an addition equation without repeating numbers

To form an addition equation using the numbers 1-9 without repeating any numbers, you can proceed as follows:

1. Start by selecting any number from the range 1-9 to use as the first addend. Let's say we choose 1 as the first addend.
2. Next, select another number from the remaining range of 1-9 (excluding the number already chosen in step 1) to use as the second addend. Let's say we choose 2 as the second addend.
3. Now, simply write down the addition equation using the two addends chosen in steps 1 and 2: 1 + 2 = 3.

Therefore, a valid addition equation without repeating numbers using the numbers 1-9 is 1 + 2 = 3.