1.    Add the first and the last terms of the sequence.

Find the sum of 1 + 2 . . . + 99 + 100.
(The terms are 1, 2, . . . 100 form an arithmetic sequence since the next term is obtained by adding 1 to the preceding term)
The first and the last terms are 1 and 100. Add the, 1+ 100 = 101 Continue Reading

How to add all numbers from one until 99 or just any consecutive numbers from 1 until 99—Math tips and tricks

Have you wondered how to solve or add numbers from 1 until any 2 digit numbers?

Adding numbers is a difficult task if you do not know the tricks on how to shorten the process in solving it or if you do not have any calculating machine. Just imagine adding odd numbers such as 1 + 3 + 5 + 7 + 9. . . through + 99. It is time consuming. To add this manual at a very easy way, just follow the steps below. Continue Reading

Have you wondered how to solve or add odd numbers from 1 until any 2 digit numbers?

Adding odd numbers is a difficult task if you do not know the tricks on how to shorten the process in solving it or if you do not have any calculating machine. Just imagine adding odd numbers such as 1 + 3 + 5 + 7 + 9. . . through + 99. It is time consuming. To add this manual at a very easy way, just follow the steps below. Continue Reading

Have you wondered how to solve or add even numbers from 2 until any 2 digit numbers?

Adding even numbers is a difficult task if you do not know the tricks on how to shorten or short cut the process in solving it or if you do not have any calculating machine. Just imagine adding even numbers such as 2 + 4 + 6 + 8 + 10. . . through + 98. It is time consuming. To add this manual at a very easy way, just follow the steps below. Continue Reading