Number+Problems

Number Problems

Find a shortcut for adding all the numbers from 1-20.

Can you find a shortcut for finding the sum of all the numbers from 1 to 99? 1 + 2 + 3 + 4 + ........... + 96 + 97 + 98 + 99

Find a shortcut to get the sum of all the numbers from 4 to 180 inclusive (including 4 and 180).

Find a shortcut for finding the sum of the firs 50 odd numbers.

If the 5 key on your calculator were broken, how wcould you do this problem: 458 + 548 + 354 ? Is there more than one way? Which way do you like the best? Why? media type="custom" key="411297"