Homework Help: Chemistry

Posted by Brandon on Thursday, February 19, 2009 at 5:05pm.

I am supposed to add up these numbers, using the significant digits rules.

150
76.9
209
.036

I got 435.936. Following the sig. digs. rules, it would be 435.9, right? How does this then equal 440 as my science books says? Thank you so much.

Chemistry - Chopsticks, Thursday, February 19, 2009 at 5:20pm
The lowest sig fig in all the number you added was 2. So you should round your total which is 435.936 so you can get 2 sig figs in your answer. 440 has 2 sig figs.
Chemistry - bobpursley, Thursday, February 19, 2009 at 5:24pm
Chopsticks is almost right. The least sig digit is the tens (150) so nothing past that makes any sense.

440

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