http://www.cartage.org.lb/en/themes/Sciences/Chemistry/Miscellenous/Helpfile/Units/AdditionSubtraction.htm
I think 1 and 3 are ok.
I would have added #2 to give
1.00276, then rounded that to 1.0028. See the site above.
are these correct when solving for proper significant figures
2.33 + 4.0045=6.33
.000456 + 1.0023=1.0027
2.33/4.0045=.582
1 answer