Question

According to significant figure convention, the result obtained by adding $12.11,18.0$ and $1.012$ is

• A. 31.12
• B. 31.1
• C. 31
• D. 31.122

Answer 1

Answer: (B)

According to significant figure convention, during adding, the number of decimal places in the answer should not exceed the number of decimal places in either the numbers.


$12.11$

$18.0$

$11.012$

______
$31.122$

_______

$18.0$ has only one digit after the decimal point, thus the result should be reported only upto one digit after the decimal point which is $31.1$.