(399)2
Answer
The easiest method would be to multiply 2 with 400 to get 800. Then we subtract a 2 to get 798. The reason is that we are trying to add up 2, 399 times. Instead, we can add up two 400 times and then subtract a 2.
(399)2
The easiest method would be to multiply 2 with 400 to get 800. Then we subtract a 2 to get 798. The reason is that we are trying to add up 2, 399 times. Instead, we can add up two 400 times and then subtract a 2.