please explain me rounding off numbers in Hindi properly and how to solve the rounding off numbers nearest ten nearest hundred nearest thousand like this please explain me how to solve this
Answers
Rounding off is a type of estimation. Estimation is used in everyday life and also in subjects like Mathematics and Physics. Many physical quantities like the amount of money, distance covered, length measured, etc are estimated by rounding off the actual number to the nearest possible whole number.
What is Rounding Off?
Rounding off means a number is made simpler by keeping its value intact but closer to the next number. It is done for whole numbers, and for decimals at various places of hundreds, tens, tenths, etc. Rounding off numbers is done to preserve the significant figures. The number of significant figures in a result is simply the number of figures that are known with some degree of reliability. The number 13.2 is said to have 3 significant figures. Non-zero digits are always significant. 3.14159 has six significant digits (all the numbers give you useful information). Thus, 67 has two significant digits, and 67.3 has three significant digits.
Rounding Rules for Whole Numbers
Rounding rules for whole numbers is as follows:
To get an accurate final result, always choose the smaller place value.
Look for the next smaller place which is towards the right of the number that is being rounded off to. For example, if you are rounding off a digit from tens place, look for a digit in the ones place.
If the digit in the smallest place is less than 5, then the digit is left untouched. Any number of digits after that number becomes zero and this is known as rounding down.
If the digit in the smallest place is greater than or equal to 5, then the digit is added with +1. Any digits after that number become zero and this is known as rounding up.
Rounding Rules for Decimal Numbers
Rounding rules for decimal numbers are as follows:
Determine the rounding digit and look at its righthand side.
If the digits at the righthand side are less than 5, consider them as equal to zero.
If the digits at the righthand side are greater than or equal to 5, then add +1 to that digit and consider all other digits as zero.