Significant Figure - Rounding
Created By: Mr. Hwong™ of Arroyo High School, El Monte, CA
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Consider the number 0.987
The 9 is considered the first significant figure.
The 8 is considered the second significant figure.
and so on. . .
When rounding to the second significant figure, the 7 will cause the 8 to round up.
Answer to rounding to second significant figure: 0.99
- 1.
Round 65.3 to 1 significant figure
- A.
7
- B.
70
- C.
65
- D.
6
Correct Answer
B. 70Explanation
6 is the first significant figure. The 5 will cause the 6 to round up. The 0 is still necessary to keep the same value of the number.Rate this question:
-
- 2.
Round 6.581 to 2 significant figures.
- A.
6.5
- B.
6.6
- C.
6.0
- D.
6.600
Correct Answer
B. 6.6Explanation
5 is the second significant figure. The 8 will cause the 5 to round up. It is incorrect to write zeros at the end, which will add additional significant figures.Rate this question:
-
- 3.
Round 0.7438 to 2 significant figures.
- A.
0.7430
- B.
0.7400
- C.
0.75
- D.
0.74
Correct Answer
D. 0.74Explanation
4 is the second significant figure. The 3 will cause the 4 to stay the same. It is incorrect to write zeros at the end, which will add additional significant figures.Rate this question:
-
- 4.
Round 0.0052135 to 3 significant figures.
- A.
0.00
- B.
0.01
- C.
0.0052100
- D.
0.00521
Correct Answer
D. 0.00521Explanation
1 is the third significant figure. The 3 will cause the 1 to stay the same. It is incorrect to write zeros at the end, which will add additional significant figures. Zeros at the front of nonzero numbers are not considered significant.Rate this question:
-
- 5.
Round 481.4 to 3 significant figures.
- A.
481
- B.
482
- C.
481.0
- D.
482.0
Correct Answer
A. 481Explanation
1 is the third significant figure. The 4 will cause the 1 to stay the same. It is incorrect to write zeros at the end, which will add additional significant figures.Rate this question:
-
- 6.
Round 0.298204 to 1 significant figure.
- A.
0.2
- B.
0
- C.
0.3
- D.
0.300000
Correct Answer
C. 0.3Explanation
2 is the first significant figure. The 9 will cause the 2 to round up. It is incorrect to write zeros at the end, which will add additional significant figures.Rate this question:
-
- 7.
Round 80.2543 to 4 significant figures.
- A.
80.2500
- B.
80.2600
- C.
80.25
- D.
80.26
Correct Answer
C. 80.25Explanation
5 is the fourth significant figure. The 4 will cause the 5 to stay the same. It is incorrect to write zeros at the end, which will add additional significant figures.Rate this question:
-
- 8.
Round 54123.82 to 4 significant figures.
- A.
54124
- B.
5412
- C.
54120
- D.
54120.00
Correct Answer
C. 54120Explanation
2 is the fourth significant figure. The 3 will cause the 2 to stay the same. The 0 is still necessary to keep the same value of the number. The decimal and the two zeros after the decimal are not necessary and will add additional significant figures.Rate this question:
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- 9.
Round 0.002852895 to 3 significant figures.
- A.
0.00285
- B.
0.00
- C.
0.002850000
- D.
0.00286
Correct Answer
A. 0.00285Explanation
5 is the third significant figure. The 2 will cause the 5 to stay the same. It is incorrect to write zeros at the end, which will add additional significant figures.Rate this question:
-
- 10.
Round 0.000 025 385 631 to 3 significant figures.
- A.
0.000
- B.
0.000 025
- C.
0.000 025 4
- D.
0.000 025 400 000
Correct Answer
C. 0.000 025 4Explanation
3 is the third significant figure. The 8 will cause the 3 to round up. It is incorrect to write zeros at the end, which will add additional significant figures.Rate this question:
-
- 11.
Round 10.2 to 1 significant figure.
- A.
1
- B.
10
- C.
10.
- D.
10.0
Correct Answer
B. 10Explanation
1 is the first significant figure. The 0 will cause the 1 to stay the same. The 0 is still necessary to keep the same value of the number.Rate this question:
-
- 12.
Round 0.05060 to 2 significant figure.
- A.
0.0
- B.
0.051
- C.
0.050
- D.
0.05000
Correct Answer
B. 0.051Explanation
Third 0 is the second significant figure. The 6 will cause the 0 to round up. It is incorrect to write zeros at the end, which will add additional significant figures.Rate this question:
-
- 13.
Round 0.003501 to 2 significant figures.
- A.
0.0
- B.
0.0035
- C.
0.00350
- D.
0.003500
Correct Answer
B. 0.0035Explanation
5 is the second significant figure. The 0 will cause the 5 to stay the same. It is incorrect to write zeros at the end, which will add additional significant figures.Rate this question:
-
- 14.
Round 0.276 to 1 significant figure.
- A.
0
- B.
2
- C.
0.3
- D.
0.2
Correct Answer
C. 0.3Explanation
2 is the first significant figure. The 7 will cause the 2 to round up.Rate this question:
-
- 15.
Round 5.0063 to 3 significant figures.
- A.
5.00
- B.
5.01
- C.
5.0100
- D.
501
Correct Answer
B. 5.01Explanation
The second 0 is the third significant figure. The 6 will cause the 0 to round up. It is incorrect to write zeros at the end, which will add additional significant figures.Rate this question:
-
- 16.
Round 8.2091 to 4 significant figures.
- A.
8.2090
- B.
8.209
- C.
8.210
- D.
8.21
Correct Answer
B. 8.209Explanation
9 is the fourth significant figure. The 1 will cause the 9 to stay the same. It is incorrect to write zeros at the end, which will add additional significant figures.Rate this question:
-
- 17.
Round 90710 to 2 significant figures.
- A.
90000
- B.
91
- C.
91000
- D.
91000.
Correct Answer
C. 91000Explanation
0 is the second significant figure. The 7 will cause the 0 to round up. The 0 at the end of the round 1 is still necessary to keep the same value of the number.Rate this question:
-
- 18.
Round 0.0100331 to 5 significant figures.
- A.
0.0100
- B.
0.010033
- C.
0.0100331
- D.
0.0100330
Correct Answer
B. 0.010033Explanation
The fourth 0 is the fifth significant figure. The 3 will cause the 0 to stay the same. It is incorrect to write zeros at the end, which will add additional significant figures.Rate this question:
-
- 19.
Round 73860.01 to 3 significant figures.
- A.
73900.
- B.
74000
- C.
73900
- D.
73800
Correct Answer
C. 73900Explanation
8 is the third significant figure. The 6 will cause the 8 to round up. The 0 is still necessary to keep the same value of the number.Rate this question:
-
- 20.
Round 0.002 365 730 8 to 4 significant figures.
- A.
0.002
- B.
0.002 366
- C.
0.002 366 000 0
- D.
0.002 365
Correct Answer
B. 0.002 366Explanation
5 is the fourth significant figure. The 7 will cause the 5 to round up. It is incorrect to write zeros at the end, which will add additional significant figures.Rate this question:
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Mar 19, 2023Quiz Edited by
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Sep 03, 2017Quiz Created by
Harry Hwong
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