###1 Did you know how you can round numbers?
Rounding numbers in arithmetic is excessively useful, specially for graphic artist who aim to write expressions, such as After Effects’ users.
The way you round numbers follows a primary rule. For rounding numbers to the nearest ten, you must pay attention to the last digit, if it’s less or equal to 4, you turn it down, if it’s bigger than 4 you round it up.
For instance, you have 82, the last digit is 2, and since it’s less than 4, you round it down, which becomes 0, and then add it to 8, makes 80, in other words, turning it down lest ten which is 80, while if it was 86 we would turn it up to bigger ten which would result in 90.
Following this rule, for nearest hundred we pay attention to last two digits, and if the number was equal or less than 49, we repeat the foresaid process.
e.g : 157 → 200