use the digits 3,5,9,4 only once to make 2addends whose sum is between 100 and 110

59 + 43

59 + 43 = 102 ;)

To find two addends whose sum is between 100 and 110 using the digits 3, 5, 9, and 4 only once, you can try different combinations until you find a suitable solution. Here's one possible approach:

Start by arranging the digits in descending order: 9, 5, 4, 3.

Step 1: Choose the largest digit, 9, for the first addend. This leaves us with 5, 4, and 3 for the second addend.

Step 2: Try different combinations with the remaining digits (5, 4, and 3) to find a sum between 100 and 110. Start with the largest remaining digit, 5:

- If we choose 5 for the second addend, the sum would be 9 + 5 = 14, which is less than 100.
- Next, try 4 as the second addend: 9 + 4 = 13, still less than 100.
- Finally, try 3 as the second addend: 9 + 3 = 12, still less than 100.

Since there are no suitable combinations with 9 as the first addend, let's consider the next largest digit, 5.

Step 3: Choose 5 as the first addend. This leaves us with 9, 4, and 3 for the second addend.

- If we choose 9 for the second addend, the sum would be 5 + 9 = 14, which is still less than 100.
- Next, try 4 as the second addend: 5 + 4 = 9, still less than 100.
- Finally, try 3 as the second addend: 5 + 3 = 8, still less than 100.

Since there are no suitable combinations with 5 as the first addend, let's move on to the next largest digit, 4.

Step 4: Choose 4 as the first addend. This leaves us with 9, 5, and 3 for the second addend.

- If we choose 9 for the second addend, the sum would be 4 + 9 = 13, which is still less than 100.
- Next, try 5 as the second addend: 4 + 5 = 9, still less than 100.
- Finally, try 3 as the second addend: 4 + 3 = 7, still less than 100.

Since there are no suitable combinations with 4 as the first addend, let's consider the smallest remaining digit, 3.

Step 5: Choose 3 as the first addend. This leaves us with 9, 5, and 4 for the second addend.

- If we choose 9 for the second addend, the sum would be 3 + 9 = 12, still less than 100.
- Next, try 5 as the second addend: 3 + 5 = 8, still less than 100.
- Finally, try 4 as the second addend: 3 + 4 = 7, still less than 100.

Since there are no suitable combinations with 3 as the first addend, you have exhausted all possible combinations with these digits. Unfortunately, there are no two addends whose sum is between 100 and 110 using the digits 3, 5, 9, and 4 only once.