Question

Round off to three significant figures 0.002 621 7 L

Answer 1

Round off one by one

$\\ \tt\bull\rightarrowtail 0.0026217$

$\\ \tt\bull\rightarrowtail 0.002622$

$\\ \tt\bull\rightarrowtail 0.00262$

$\\ \tt\bull\rightarrowtail 0.0026$

$\\ \tt\bull\rightarrowtail 0.003$