1st Quarter Chemistry 2012: Significant Figure Calculations

Significant Figure Calculations

Figure out how to do calculations using the magic of significant figures. 

Solve the following mathematical problems such that the answers have the correct number of significant figures:

1)        334.54 grams + 198 grams = ___________________

2)        34.1 grams / 1.1 mL = ___________________

3)        2.11 x 10³ joules / 34 seconds = ___________________

4)        0.0010 meters – 0.11 m = ___________________

5)        349 cm + 1.10 cm + 100 cm = ___________________

6)        450 meters / 114 seconds = ___________________

7)        298.01 kilograms + 34.112 kilograms = ___________________

8)        84 m/s x 31.221 s = ___________________

SPOILER ALERT!!!     SPOILER ALERT!!!    SPOILER ALERT!!!     SPOILER ALERT!!!     SPOILER ALERT!!!

     

Significant Figure Calculations – Answers

Solve the following mathematical problems such that the answers have the correct number of significant figures:

1)        533 grams (rounded from 532.42 grams)

2)        31 g/mL (not rounded)

3)        62 J/s (rounded from 62.0588 J/s)

4)        -0.11 m (rounded from -0.109 m)

5)        500 cm (rounded from 450.1 cm)

6)        3.9 m/s (rounded from 3.9474 m/s)

7)        332.12 kg (rounded from 332.122 kg)

8)        2600 m (rounded from 2622.564 m)

1st Quarter Chemistry 2012: Significant Figures Practice Worksheet

Significant Figures Practice Worksheet

You'll be significantly figuring in no time!

How many significant figures do the following numbers have?

1)        1234 _____ 

2)        0.023 _____

3)        890 _____

4)        91010 _____

5)        9010.0 _____

6)        1090.0010 _____

7)        0.00120 _____

8)        3.4 x 10⁴ _____

9)        9.0 x 10^-3 _____

10)      9.010 x 10^-2 _____

11)      0.00030 _____

12)      1020010 _____

13)      780. _____

14)      1000 _____

15)      918.010 _____

16)      0.0001 _____

17)      0.00390 _____

18)      8120 _____

19)      7.991 x 10^-10_____

20)      72 _____

SPOILER ALERT!!!    SPOILER ALERT!!!    SPOILER ALERT!!!    SPOILER ALERT!!!     SPOILER ALERT!!!

Solutions to the Significant Figures Practice Worksheet

1)        4

2)        2

3)        2

4)        4

5)        5

6)        8

7)        3

8)        2

9)        2

10)      4

11)      2

12)      6

13)      3

14)      1

15)      6

16)      1

17)      3

18)      3

19)      4

20)      2

Source: http://misterguch.brinkster.net/pra_miscellaneouswkshts.html