Instead of adding each digit in turn, acknowledge that there are 100 numbers to add, and then multiply that by the average of 1 and 100.
Ie. 100×(1+100)÷2=100×101;÷2
100×101;÷2=50×101=5050
So, in short, the answer is: 5050
25
Many of them.
The integers are -11, -9 and -7.
Add them up. Divide their total by the number of integers there are.
Because otherwise you would only know how to subtract and add with the same integers. Not a particularly useful skill unless just those integers turned up!
25
Many of them.
100
No two consecutive integers can add up to 98.No three consecutive integers can add up to 98.But 23, 24, 25, and 26 can.
2,500 50 times 50 equals 2,500 50 plus 50 equals 100
5050
The integers are -11, -9 and -7.
Add them up. Divide their total by the number of integers there are.
Because otherwise you would only know how to subtract and add with the same integers. Not a particularly useful skill unless just those integers turned up!
101+102=203
It is 50.
it is 33; you can add all up and divide by 17, or simply add first and last and divide by 2