Significant Figure - Rounding

Chemistry

Grade 5th

NGSS

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| By Harry Hwong

Harry Hwong

Community Contributor

Quizzes Created: 3 | Total Attempts: 7,183

| Attempts: 414 | Questions: 20

Quiz Lesson

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Question 1 / 20

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1. Round 0.0052135 to 3 significant figures.

0.00

0.01

0.0052100

0.00521

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.

Explanation

Submit

About This Quiz

Created By: Mr. Hwong™ of Arroyo High School, El Monte, CA
Free Chemistry education to all students: hwongclassroom. Com
Report any errors to me: harry. Hwong@emuhsd. Org
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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... see moreon. . .
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 see less

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2. Round 0.276 to 1 significant figure.

0.3

0.2

2 is the first significant figure. The 7 will cause the 2 to round up.

Explanation

2 is the first significant figure. The 7 will cause the 2 to round up.

Submit

3. Round 0.298204 to 1 significant figure.

0.2

0.3

0.300000

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.

Explanation

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.

Submit

4. Round 80.2543 to 4 significant figures.

80.2500

80.2600

80.25

80.26

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.

Explanation

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.

Submit

5. Round 6.581 to 2 significant figures.

6.5

6.6

6.0

6.600

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.

Explanation

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.

Submit

6. Round 0.7438 to 2 significant figures.

0.7430

0.7400

0.75

0.74

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.

Explanation

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.

Submit

7. Round 0.002852895 to 3 significant figures.

0.00285

0.00

0.002850000

0.00286

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.

Explanation

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.

Submit

8. Round 0.05060 to 2 significant figure.

0.0

0.051

0.050

0.05000

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.

Explanation

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.

Submit

9. Round 0.003501 to 2 significant figures.

0.0

0.0035

0.00350

0.003500

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.

Explanation

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.

Submit

10. Round 5.0063 to 3 significant figures.

5.00

5.01

5.0100

501

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.

Explanation

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.

Submit

11. Round 0.0100331 to 5 significant figures.

0.0100

0.010033

0.0100331

0.0100330

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.

Explanation

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.

Submit

12. Round 8.2091 to 4 significant figures.

8.2090

8.209

8.210

8.21

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.

Explanation

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.

Submit

13. Round 481.4 to 3 significant figures.

481

482

481.0

482.0

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.

Explanation

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.

Submit

14. Round 0.002 365 730 8 to 4 significant figures.

0.002

0.002 366

0.002 366 000 0

0.002 365

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.

Explanation

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.

Submit

15. Round 0.000 025 385 631 to 3 significant figures.

0.000

0.000 025

0.000 025 4

0.000 025 400 000

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.

Explanation

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.

Submit

16. Round 73860.01 to 3 significant figures.

73900.

74000

73900

73800

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.

Explanation

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.

Submit

17. Round 10.2 to 1 significant figure.

10.

10.0

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.

Explanation

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.

Submit

18. Round 90710 to 2 significant figures.

90000

91000

91000.

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.

Explanation

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.

Submit

19. Round 65.3 to 1 significant figure

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.

Explanation

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.

Submit

20. Round 54123.82 to 4 significant figures.

54124

5412

54120

54120.00

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.

Explanation

Submit

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