Use the digits 3,5,9,and 4 only to make 2 addends whose sum is between 100 and 110
Take any two numbers and make a 2 digit number. then add the two digits numbers to get the sum between 100 and 110
3 and 9 makes 39 . also 5 and 4 is 54
39+54 = 93 that is not between 100 and 110, so it does not works
3 and 5 makes 35 . also 9 and 4 is 94
35+94 = 129 that is not between 100 and 110, so it does not works
5 and 3 makes 53 . also 4 and 9 is 49
53+49 = 102 that is between 100 and 110, so it works
4 and 3 makes 43 . also 5 and 9 is 59
43+59 = 102 that is between 100 and 110, so it works