Your shopping cart is empty!
Explore Related Concepts


adding multiplying significant figures
Best Results From Yahoo Answers Youtube
From Yahoo Answers
Question:What are the rules for
adding
subtracting
dividing
multiplying
significant figures???
Answers:Adding and subtracting After doing this thing, find the number with least decimal significant figures and round the total to that significant figures. Multiplying and dividing After doing this, find the least significant figures and round the number to that significant figures.
Answers:Adding and subtracting After doing this thing, find the number with least decimal significant figures and round the total to that significant figures. Multiplying and dividing After doing this, find the least significant figures and round the number to that significant figures.
Question:such like (34.512X2.43)+5.6
Would you multiply the two numbers together and use significant figures for that result then add 5.6 and use significant figures again for the final answer? Or would you multiply the two numbers then add and only use signficant figures at the end?
Answers:Each case if different. when doubt, carry an extra digit. in your example, use 3 digits are good for the entire calculation. You can round the answer to 2 if you want. Subtraction is a more difficult case, as you can subtract two similar numbers and lose significance. eg 27(10005  10003) if you used 2 places throughout, you would get 0 as an answer. .
Answers:Each case if different. when doubt, carry an extra digit. in your example, use 3 digits are good for the entire calculation. You can round the answer to 2 if you want. Subtraction is a more difficult case, as you can subtract two similar numbers and lose significance. eg 27(10005  10003) if you used 2 places throughout, you would get 0 as an answer. .
Question:37.2+18.0+380=how would i round the number when the answer is 435.2 do you round to 1 sig fig?
.57X.86X17.1=8.4 is that right?
(8.13X10^4) / (3.8x10^2)=87? is that right
please explain if i did something wrong
Answers:the first answer should be 435 but the other two answers are correct. The answer is always the smallest amount of sig figs.
Answers:the first answer should be 435 but the other two answers are correct. The answer is always the smallest amount of sig figs.
Question:ex: adding  12.250 cm + 9.2 cm + 7.40 cm = ?
ex: subtracting  44.373 mg  0.2 mg = ?
ex: multipplying  0.444 cm x 52.562 cm = ?
ex: divding  9.8 g / 8.66 mL = ?
Answers:You can only be as accurate in your answer as your least accurate piece of information. In the cases you list, the answers would be 29cm, 4 x 10^1mg, 23.3cm and 1.1g/ml. If you have a 5 after the last sig fig you round to, round to the nearest even number. This way, you will be rounding up and down each about half of the time. I hope this helps.
Answers:You can only be as accurate in your answer as your least accurate piece of information. In the cases you list, the answers would be 29cm, 4 x 10^1mg, 23.3cm and 1.1g/ml. If you have a 5 after the last sig fig you round to, round to the nearest even number. This way, you will be rounding up and down each about half of the time. I hope this helps.
From Youtube
College Chemistry  Significant Figures :multiplying and dividing significant figures, adding and subtracting significant figures