Question

What is appoximation ? Write downe the rule for the rounding off

Answer 1

Explanation:

An approximation is a value or quantity that is intentionally similar but not exactly correct. 2. A number can be approximated by rounding. Write down the rules for rounding off: ... Look for the next smaller place which is towards the right of the number that is being rounded off to

Answer 2

Answer:

An approximation can be defined as something that is similar, but not actually equal to something else.

Rounding off indicates a number is made simpler by holding its value unchanged but near to the next number.

Explanation:

An approximation can be defined as something that is similar, but not actually equal to something else. A number is approximated by rounding. A calculation is usually approximated by rounding the values within it before doing operations.

Rounding off indicates a number is made simpler by holding its value unchanged but near to the next number. It is done for whole numbers, and for decimals. It is done to maintain the significant figures.

Rounding rules for whole numbers:

• To get an accurate result, always select the smaller place value.

• Look for the following smaller place that is towards the right to the number that is being rounded off.

• If the number in the smallest place is smaller than 5, then it is left unchanged. Any number after that number becomes zero and this is also known as rounding down.

• If the number in the next place is greater than or equal to 5, then the digit is added +1. Any number after that number become zero and this is known as rounding up.

Rounding rules for decimal numbers:

• select the digit to round off and look at its righthand side.

• If the number at the righthand side is less than 5 omit the number.

• If the number at the righthand side is greater than or equal to 5, then add +1 to that digit.