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The **subtraction ** is another one of the fundamental operations of Arithmetic.
It is the inverse operation of the sum.

It consists of take (decrease), a given number (16), another one (5).

Its representation is:

To verify that the subtract is well done, add the

To subtract two numbers, put minuend and below subtrahend, so that they match the units, tens, hundreds etc ... Draw a line under subtrahend and orderly proceed to subtract all the columns, starting with the units, then tens and so on, until we reach the last column.

8 | 3 | 9 | 5 | 7 | ||

- | 4 | 8 | 6 | 7 | 3 | |

______________ | ||||||

3 | 5 | 2 | 8 | 4 |

**7 - 3 = 4**, we put the**4**under the units.**5 - 7**, as to 5 we cannot subtract 7, then add 5 to 10 (a unit of the next column, hundreds in this case, which is 10 tens), and will be**15 - 7 = 8**. We put the**8**under the tens, and we "store" (carry) 1 that will add to subtrahend of the next column.**9 - 6**, as we carried 1 (6+1=7), will be**9 - 7 = 2**. We put the**2**under the hundreds.**3 - 8**, as to 3 we cannot subtract 8, then add 3 to 10 (a unit of the next column, units of thousands in this case, which is 10 hundreds), and will be**13 - 8 = 5**. We put the**5**under the units of thousands, and we "carry" 1 that will add to subtrahend of the next column.**8 - 4**, as we carried 1 (4+1=5), will be**8 - 5 = 3**. We put the**3**under the tens of thousands.

And we have already concluded: ** 83.957 - 48.673 = 35.284**

(thirty-five thousand two hundred eighty-four).

Now we see that subtraction is well done:

**35.284 + 48.673 = 83.957 **

The games in the menu will help you to practice subtractions.