Learn to Add
The add is the first of the fundamental operations of arithmetic. It is represented with the symbol " + " .
It consists of increasing a specific number (add up) the value of others. So this operation is also called addition.
The numbers we've added are called addends, in Spanish sumandos, and the result is called sum or total.
To add several numbers, we are going to put them underneath each other so that they match the units, tens, hundreds etc ... Draw a line under the last addends and orderly proceed to add all columns, starting with the units, then tens and so on until we reach the last column.
We are going to see this example: 7.653 + 3.782 + 9.214
| 7 | 6 | 5 | 3 | ||
| 3 | 7 | 8 | 2 | ||
| + | 9 | 2 | 1 | 4 | |
| 2 | 0 | 6 | 4 | 9 | |
- 3 + 2 + 4 = 9, We put the 9 under the units.
- 5 + 8 + 1 = 14, We put the 4 under the tens and we "store" (carry) 1 that will add to the next column.
- 6 + 7 + 2 = 15, 15 + 1 (which we carried) = 16. We put the 6 under the hundreds and we "carry" 1 that will add to the next column.
- 7 + 3 + 9 = 19, 19 + 1 (which we carried) = 20. As we have no columns to add, we put the 20.
And we have already concluded: 7.653 + 3.782 + 9.214 = 20.649
(twenty thousand six hundred and forty-nine)
