# Significant Figure - Addition Subtraction

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| By Harry Hwong
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Harry Hwong
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Questions: 6 | Attempts: 5,557

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Created By: Mr. Hwong™ of Arroyo High School, El Monte, CA
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Significant Figure - Addition Subtraction Rule: Round answers to the least accurate digit.

• 1.

### Solve and round accordingly:   4.928 + 37.71 + 5.2543

• A.

47.8923

• B.

47.9

• C.

47.892

• D.

47.89

D. 47.89
Explanation
The least accurate digit is from 37.71, which has 2 decimal places.

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• 2.

### Solve and round accordingly:   8.14 + 6.7550 + 6.504

• A.

21.3990

• B.

21.399

• C.

21.40

• D.

21.4

C. 21.40
Explanation
The least accurate digit is from 8.14, which has 2 decimal places. The last zero is required to maintain 2 decimal places.

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• 3.

### Solve and round accordingly:   5.91 - 7.4

• A.

13.31

• B.

13.3

• C.

-1.49

• D.

-1.5

D. -1.5
Explanation
The least accurate digit is from 7.4, which has 1 decimal places. This is a subtraction problem and has led to a negative answer.

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• 4.

### Solve and round accordingly:   5.494 - 4.30

• A.

1.19

• B.

9.79

• C.

1.194

• D.

1.2

A. 1.19
Explanation
The least accurate digit is from 4.30, which has 2 decimal places.

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• 5.

### Solve and round accordingly:   7.1615 + 44.8200

• A.

51.9815

• B.

51.981

• C.

51.98

• D.

52.0

A. 51.9815
Explanation
The least accurate digit is from both numbers, which has 4 decimal places.

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• 6.

### Solve and round accordingly:   63.478 - 52.12

• A.

115.598

• B.

115.59

• C.

115.60

• D.

11.36

D. 11.36
Explanation
The least accurate digit is from 52.12, which has 2 decimal places.

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• Current Version
• Apr 29, 2024
Quiz Edited by
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• Sep 03, 2017
Quiz Created by
Harry Hwong

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