Posted by **Katrina** on Sunday, September 17, 2006 at 7:03pm.

when we do convertions, do we have follow the rules for rounding?

is it 118.5cm=1.19m, or 118.5cm=1.18m?

It depends upon how many significant figures (sf) you are allowed, whether you are doing converSions or calculating some other problem. By definition, there are 100.000000000 cm in 1.00000000000 meter; therefore, 118.5 cm = 1.185 m. You have 4 sf in 118.5 and you are allowed to have 4 in the answer.

the precision of the stopwatch is 0.01second, if the question ask us to provide the answer to the nearest 0.1second,so...

12.65seconds=12.6 or 12.7seconds?

Some people do rounding differently when the last number is a 5. I follow the rule to "round to the even number." Therefore, I would round to 12.6 since 6 is the even number. If it were 12.75, I would round to 12.8 (the nearest even number). I hope this helps.

## Answer This Question

## Related Questions

- CHEMISTRY: URGENT DRBob222 - I thought it was similar so I wrote... x + y = 30cm...
- Math to Ms.Sue (urgent ) - 11. Lorenzo has a checkbook balance of $118.00. He ...
- Word Problem - I have a couple of questions. Could you please check one of them ...
- a - A rectangle is 3times as long as it is wide the perimeter is 60cm. Find the ...
- Physics with work, pls help - A proton is moving in a circular orbit of radius ...
- Chemistry - Hi guys! I just learned about significant figures today, and I have ...
- chemistry - Which of the following is NOT true? A. A measurement contains ...
- Science (Chemistry!) - I just do not understand ANYTHING about multiplying/...
- Science - I'm a little confused when it comes to significant figures. Where it ...
- Geometry - Find the surface area for each of the following Rt. Square Pyramid 6....

More Related Questions