Counting Sig Figs Flashcards
6
has how many significant figures?
6
Has 1 sig fig
20
has how many significant figures?
20
Has 1 sig fig
400
has how many significant figures?
400
Has 1 sig fig
0.05
has how many significant figures?
0.05
Has 1 sig fig
0.007
has how many significant figures?
0.007
Has 1 sig fig
0.0004
has how many significant figures?
0.0004
Has 1 sig fig
30
has how many significant figures?
30
Has 1 sig fig
3000
has how many significant figures?
3000
Has 1 sig fig
80000
has how many significant figures?
80000
Has 1 sig fig
12
has how many significant figures?
12
Has 2 sig figs
55
has how many significant figures?
55
Has 2 sig figs
770
has how many significant figures?
770
Has 2 sig figs
0.033
has how many significant figures?
0.033
Has 2 sig figs
0.00090
has how many significant figures?
0.00090
Has 2 sig figs
0.0020
has how many significant figures?
0.0020
Has 2 sig figs
1.6
has how many significant figures?
1.6
Has 2 sig figs
25000
has how many significant figures?
25000
Has 2 sig figs
930
has how many significant figures?
930
Has 2 sig figs
1.20
has how many significant figures?
1.20
Has 3 sig figs
284
has how many significant figures?
284
Has 3 sig figs
9.82
has how many significant figures?
9.82
Has 3 sig figs
0.0308
has how many significant figures?
0.0308
Has 3 sig figs
156
has how many significant figures?
156
Has 3 sig figs
28.5
has how many significant figures?
28.5
Has 3 sig figs
3.96
has how many significant figures?
3.96
Has 3 sig figs
0.719
has how many significant figures?
0.719
Has 3 sig figs
0.0442
has how many significant figures?
0.0442
Has 3 sig figs
0.08800
has how many significant figures?
0.08800
Has 4 sig figs
5988
has how many significant figures?
5988
Has 4 sig figs
37.07
has how many significant figures?
37.07
Has 4 sig figs
987.4
has how many significant figures?
987.4
Has 4 sig figs
2807
has how many significant figures?
2807
Has 4 sig figs
2005
has how many significant figures?
2005
Has 4 sig figs
20.05
has how many significant figures?
20.05
Has 4 sig figs
1.003
has how many significant figures?
1.003
Has 4 sig figs
37982
has how many significant figures?
37982
Has 5 sig figs
4328.9
has how many significant figures?
4328.9
Has 5 sig figs
49.924
has how many significant figures?
49.924
Has 5 sig figs
9.7703
has how many significant figures?
9.7703
Has 5 sig figs
0.73666
has how many significant figures?
0.73666
Has 5 sig figs
0.012345
has how many significant figures?
0.012345
Has 5 sig figs
37.003
has how many significant figures?
37.003
Has 5 sig figs
1234500
has how many significant figures?
1234500
Has 5 sig figs
81.909
has how many significant figures?
81.909
Has 5 sig figs
600783
has how many significant figures?
600783
Has 6 sig figs
48923.4
has how many significant figures?
48923.4
Has 6 sig figs
559.832
has how many significant figures?
559.832
Has 6 sig figs
30.0004
has how many significant figures?
30.0004
Has 6 sig figs
1234567
has how many significant figures?
1234567
Has 7 sig figs
800.0008
has how many significant figures?
800.0008
Has 7 sig figs
When a scientist writes down a number how many “uncertain digits” do they typically keep.
One
This will usually be the last digit on the right.
454.07
If a number has a
zero with a line over it…
Where is the uncertain digit?
(This is an important exception to some other rules you might see on these flash cards.
The zero with the line over it is the uncertain digit.
670.45
Which digit above is the uncertain digit?
670.45
930,020
Which digit above is the uncertain digit?
930,020
.0080
Which digit above is the uncertain digit?
.0080
2000
Which digit above is the uncertain digit?
2000
An “EXACT NUMBER” has how many sig figs?
Unlimited
An exact number is not a measurement, thus, it has no uncertainty.
You pick 3 tennis balls out of a bin. What is the uncertainty associated with the number 3 in this case.
There is no uncertainty.
You can be sure you have “EXACTLY” 3 tennis balls.
You counted to 3, you did not “measure” 3 tennis balls.
.008
Which digit above is the uncertain digit?
.008
What is meant by the words
“The Uncertain Digit?”
The “Uncertain Digit” is usually the farthest digit on the right.
- 2
- 770
574
92.000
When we ask
“How many digits wide is a number?”
What do we mean?
We mean
how many digits from the Big Digit to the Uncertain Digit.
- This number is 5 digits wide:*
603. 04
What is the “Mantissa” of this number?

1.25

What is the “Mantissa” of this number?

1.38502

What is the exponent of this number?

The 3 (or the 103)

What is the exponent of this number?

-1 (or the 10-1)
