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Counting Sig Figs
Rounding Sig Figs
Addition / Subtraction
Multiply / Divide
Scientific Notation
100

How many sig. figs are in 0.004560

4

100

Round 35.6789 to three sig figs?

35.7

100

12.11 + 0.03 = ?   

(must have correct # of sig figs)

12.14

(Calc = 12.14)

100

2.5 x 3.45 = ? 

(must have correct # of sig figs)

8.6

(Calc = 8.55)

100

Write 12,000 in scientific notation.

1.2 x 104

200

How many sig. figs. are in 8.90?

3

200

Round 0.009876 to 2 sig figs.

0.0099

200

145.3 - 23.11= ?  

(must have correct # of sig figs)

122.2

(Calc = 122.19)

200

45.0 / 2.0 = ?

(must have correct # of sig figs)

22

(Calc = 22.5)

200

Write out 0.00028 in scientific notation

2.8 x 10-4

300

How many sig. figs. are in 3,000

1

300

Round 519.5531 to 3 sig figs.

520

300

100.0 - 23.456 = ?

(must have correct # of sig figs)

76.5

(Calc = 76.544)

300

4.56 x 1.4 = ?

(must have correct # of sig figs)

6.4

(Calc = 6.384)

300

Write out 7.3 x 109 in standard form

7,300,000,000

400
How many sig. figs. are in 0.00050700?

5

400

Round 5.858 to 2 sig figs.

5.8

400

3.456 + 0.12 + 18.3 = ?

(must have correct # of sig figs)

21.9

(Calc = 21.876)

400

(12.105 x 3.090) / 2.10 = ?

(must have correct # of sig figs)

17.8

(Calc = 17.81164)

400

Write  70,890,000 in scientific notation

7.089 x 107

500

How many sig. figs. are in 1,006.010

7

500

Round 9.9999 to 3 sig figs

10.0

500

456.78 - 1 = ?

(must have correct # of sig figs)

456

(Calc = 455.78)

500

(4.56 x 7.4) / 0.00320 = ?

(must have correct # of sig figs)

10,000

(Calc = 10,545)


500
Write out 5.60 x 10-6 in standard form

0.00000560