Rounding off

In maths, sometimes we get a complicated number like a whole number then the decimal numbers comes along!
So we round off, this is how you do.

To round off a number,
* We round up (add 1 ) if the next figure is 5 or more.
* We round down (leave it) if the next figure is less than 5.

here's the first example, 5429.
Now we're going to round it of to the nearest ten, now we see that 9 is more than 5 so we round off and add 1 to 2 and put zero where 9 is staying, therefore is 5430.
second, now we're going to round off to the nearest hundred. Now, 429. 2 is smaller than 5, so we change 2 and 9 to zeros.
Third, we're going to round it off to the nearest thousand. 5429, 4 is smaller than 5, so we change 4,2 and 9 to zeros.

Second example is 759345. Firstly, to round it off to the nearest ten, 5 (next to the 4) is 5, so we round it up to 50 and we got 759350. Second is to round it off to the nearest hundred. 345,4 (next to 3) is smaller than 5 so we round it off to 759300.
Third would be rounding off to the thousand. now 9345, we can see that 3 ( next to 9) is smaller than  5 so we change 3,4 and 5 to zeros and we have 759000. Forth is rounding off to the ten thousand. 59345 9 is bigger than 5 but 3 is smaller than 5 so we change 3,4,5 and 9 to zeros and we got 750000.




Now lastly, rounding off is used most in our like rounding the number of people at mall or at some events that you want to call, secondly it uses in counting money to calculate the approximation of the amount of money.