23 over 90
-5-1 plus 4 plus 2-6 plus 4 is equal to -2
30. 2+3+5=10, 4+6=10, and 2+4+1+1+2=10.
2 + 1 + 5 + 52 + 4 + 6 = 70
2 1/5 + 1/4 + 1/4 = 2 7/10.
No, 1 + 2 + 3 + 4 + 5 = 15.
It is 77
1 1/2 plus 4 2/3 equals 5 3/5.
1 + 2 + 3 + 4 + 5 + 6 + 100 = 121
102
-4 + -5 + -2 + -1 = -12 (negative 12).
(n2 + n)/2 1+2+3+4+5+n= 15+n
25