Significant Figures and Rounding Measurements Name ___Ashli
Fledderman___________Per 36N
1. Round off each of the following numbers to three significant figures
a. 15.9994 16.0 b. 1.0080 1.01
c. 0.6654 0.665 d. 4885 4890
e. 87,550 876,000 f. 0.027225 0.272
2. Put the following numbers into scientific notation and write down the number of
significant digits in each:
a. 0.225 2.25x10^-1 3 sig figs b. 2.500 2.50x10^0 3 sig figs
c. 44,163 4.4162x10^4 3 sig figs d. 20,190 2.019x10^4 4 sig figs
e. 0.000000000009910 9.910x10^-12 4 sig figs f. 7,000. 7x10^3 4 sig figs
3. How many significant figures are in each of the following numbers?
a. 225.0 4 sig figs b. 1000.0 5 sig figs
c. 0.0003210 4 sig figs d. 0.0067 2 sig figs
e. 1,000,000. 7 sig figs f. 2.00001 6 sig figs
4. Perform the indicated arithmetic operations, and round the results to the appropriate
number of significant digits. (see the back also)
a. 77.981 x 2.33 =181.7 rounded to 4 sigs figs
b. 4 x 0.0665 =0.27 rounded to 2 sig figs
c.4417.344+ 4.900 + 23.144444= 45.3 rounded to 3 sig figs
44444444444444444444444444444444444444444444444444444444
d. 9.80 – 4.762 =5.04 rounded to 3 sig figs
e. 3.9 x 6.05 x 420 =9900 rounded to 2 sig figs
f. 14.1 / 5 =2.8 rounded to 2 sig figs
g. 1001 + 16.23 44=1017 rounded to 4 sig figs44
h. 424.5 + 2.84614=427.3 rounded to 4 sig figs44
i. 9.9 – 9.544444=0.36 rounded to 2 sig figs
