SIG FIGs

SIG FIG Rules

100

All non-zero digits are ____.

significant

200

Zeroes between 2 nonzero digits are _____.

significant

300

Leading zeroes are _____.

not significant

400

Trailing zeroes before an implied decimal point are _____

ambiguous

500

When are trailing zeroes significant? 

Trailing zeroes are always significant in numbers that have decimal points. If the number does not have a decimal point, the number is ambiguous. 

True or False

100

True or False: When collecting data in a lab, each number should have the same number of significant figures.

True

200

True or false: 0.978 has 3 significant figures.

true

300

True or false: 780.091 has 5 significant figures.

False, it has 6 significant figures figures.

400

True or False: When adding or subtracting, you use the number with the least amount of significant figures to determine how many significant figures the answer has.

False, you would use the least number of decimal places.

500

True or false: When multiplying or dividing, you use the number with the least amount of decimal places to determine how many significant figures the answer has.

False, you would use the number of significant figures.

Count the SIG FIGs

100

How many significant figures does this number have? 

0.31

2

200

How many significant figures does this number have?

2.60

3

300

How many significant figures does this number have?

0.076

2

400

How many significant figures does this number have?

0.0001032

4

500

How many significant figures does this number have?

0.00120003409

9

Calculations 1

100

32.12 - 26.5 = ?

5.6 

200

10.51 x 2.23 = ?

23.4

300

25.6 x 3.2

8.2 x 10^1 

400

83.5 - 0.56 + (5.67 / 3.5) = ?

84.6

500

(67.91 - 56.34 / 3.21) + (33.6 x 2.1) = ?

1.2 x 10^2

Calculations 2

100

58.34 - 0.327 = ?

58.01

200

5.9 + 2.41 = ?

8.3

300

126.59 + 0.4027 = ?

127.0

400

2.85 / 5.1 - 1.325 + 1.1 = ?

0.3

500

123.58 - 68.9 + 0.3 - (2.5 x 0.56) = ?

53.6