Addition and subtraction in decimals.

  In this lesson we're going learn adding and subtracting decimals. Adding and subtracting decimals are different from adding and subtracting the whole number.
Reason is there's a decimal point and we need to put the decimal point in the right position.

On adding decimals,  you have to make the decimal point directly under each other.
On subtracting decimals you make the decimal point directly under each other, and borrow 1 if necessary.



  Our first example is 3.42 + 23.56 + 5.09 + 34.23.
Now we do it in the easy way.

                                                     3.42     All you need to remember is the order of operation and
                                                   23.56   and make all the decimal point directly under each other.
                                                     5.09
                                            +     34.23
                                                   
                                                    66.3                  
                                           
 Second example is 89.76 - 34.23.
                                               
                           89.76
                        - 34.23
                           55.53

  Therefore our answer is 55.53.


Third and last example is," On Monday I spend $25.45 on entertainment, $12.56 for transport, and $4.00 on drink. How much have I left over from $60.00?

  This question want s you to find the amount spend then subtract from $60.00
The total is $25.45 + $12.56 + $4.00 = $42.01
Then we subtract from $60.00.
Therefore $60.00 - $42.01 = $17.99,
and the answer would be $17.99 left.

* Don't forget to place all the decimal points directly under each other.