Question

what is approximation? Write down the rules for rounding off​

Answer 1

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Rule 1: Determine what your rounding digit is and look at the digit to the right of it (highlighted digit). If the highlighted digit is 1, 2, 3, 4 simply drop all digits to the right of rounding digit. Example: 3.423 may be rounded off to 3.42 when rounded off to the nearest hundredths place.

Answer 2

Definitions: In an approximate number the leftmost digit is said to be the most significant digit. S.No. Rules

1. All the non-zero digits in the number are significant.

2. All the zeros that are between non-zero digits are significant.

3. The zeros on the right of a non-zero digit in a whole number are significant.