Significant figures

​Significant Figures

Rules

1) All non-zero digits are significant Eg : 435 (3 sig fig)

2) All zeros between non-zero digits are significant.

Eg : 12.006 (5 sig. fig)

3) For any decimal, all zeros before the first non-zero digit are not significant.  Eg : 0.078 (2 sig. fig)    

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Rounding to Given Significant Figures

Subject | Subject

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• Identify the digit in the required significant position

• Note the digit to the immediate right of that position.

• If the value of that digit is 5 or greater, round up by adding one to the digit in the required position.

• If the value of the digit is less than 5, keep the value of the number or add zeros as place holders

Multiple Choice

State the number of significant figures for the number 0.0801

• 5

• 3

• 4

• 2

Multiple Choice

State the number of significant figures for the number 560 001.

• 6

• 5

• 3

• 4

Multiple Choice

State the number of significant figures in 234.08

• 6

• 3

• 4

• 5

Multiple Choice

Round off 76 582 to 3 significant figures.

• 76 500

• 766

• 76 600

• 765

Multiple Choice

Round off 65.089 to 1 significant figures.

• 7

• 70

• 60

• 65.0

Multiple Choice

Round off 0.03496 to 2 significant figure.

• 0.035

• 0.03

• 0.0350

• 0.040

Multiple Choice

Round off 76.021 to 3 significant figures.

• 80.0

• 76

• 76.0

• 76.000

Multiple Choice

Round 467 820 to 3 significant figures.

• 470 000

• 468

• 468 000

• 470