how can i round the numbers 10.1, 10.2, 10.3 and 10.4 to two significant figures?

Question

if we round it to 10, it will have only 1 significant figure. If i round it to 10.0 it will have 3 of them.

Answer 1

for a number like
xy.zlmn
or
abc.def

1 significant figure
x0 or
a00
2 significant figures
xy or
ab0
3 significant figures
xy.z or
abc
4 significant figures
xy.zl or
abc.d

etc....

Answer 2

Depends on what you're trying to achieve....It has been a while since I've been in a similar situation of having to sort out significant digits. Here are some possible answers:

Answer 1: If you round to 10 in all cases, you will have TWO digits left, both of which are significant.

Answer 2: If you leave the numbers "as-is" you can count the last two digits as significant, even though there are three digits.

Answer 3: add an extra zero after the decimal point.

Answer 4: Try putting the numbers in "exponential" format, e.g. 1.00 x 10^1 (where "^" means "raised to the power of"), 1.01 x 10^1, etc., and take it from there.

Answer 3

If you want to round 10.1 to 2 signigicant figures you need to write 10.
If you write 10 this will only be 1 significant figure, the writing of the decimal point is required under technical significant figure rules.
You could also write 1.0 * 10^1

Answer 4

It would be 10. The figures between the first number and the decimal are significant even though the decimal disappears when you round it.

ex.

010.3 = 10
1003.0004 = 1003

Answer 5

Use scientific notation:

10 = 1.0E1

this equals 10, rounded to one decimal place and two significant digits.

Answer 6

Significant figures are determined by the right-most digit, not the number of digits that are non-zero. 10 is correct, since it covers the range from 9.5 to 10.5.

Answer 7

10.0 is the same as 10.

Answer 8

they already are 2 sig figs

btw u cant get more precise answer than u started with

Answer 9

sorry i don't know