Adding 79 to 321 gives 400 as the result(79+321).
79
10.2658
79
29 + 50 + 21 = (29 + 50) + 21 = 79 + 21 = 100 or 29 + 50 + 21 = 29 + (50 + 71) = 29 + 71 = 100
1,042
Sum = 79*(79+1)/2 = 79*80/2 = 3160
79 + 79 = 158
a + 79
79 + 79 = 158
It is 21 minus 100 = -79
79 + 79 = 158 / 2 = 79.