Science Help Online Worksheet 2-3s Adding and Subtracting with Significant Digits
by Brian Gutierrez

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Name__________________________ Section____________________________
RULE: When adding or subtracting, your answer must show as many decimal places as
the measurement having the fewest number of decimal places.

Perform the following calculations and round according to the rule above.

1)   8.20 + 2 =

 

 

 

 

 

2)   13.59 + 23.25 + 20 = 3)   42.828 + 67.4629 =
4)   53.4028 - 14 =                       

 

 

 

 

 

 

5)   39.3 - 0.804 = 6)   91.68 - 19.1 =
Answers 1) 10                    2) 57                        3) 110.291                       4) 39                          5) 38.5                   6) 72.6

Please forward all questions, comments and criticisms to Gregory L. Curran.
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Last Modified May 22, 2004