The Biology Corner



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Addition and Subtraction

1. Add or Subtract the numbers.

2. Look at the original numbers; determine which number has the LEAST NUMBER OF DECIMAL PLACES.

3. Round off the calculated number to the number of decimal places in Step 2.

1. 13.6 + 19 + 32.15 2. 15.1 – 1.76

3. 0.045 + 0.06 + 0.017 4. 230.45 – 45.789

5. .45 + .550 6. 13.757 + 2

Multiplication and Division

1. Multiply or Divide the numbers.

2. Look at the original numbers; determine which number has the LEAST NUMBER OF SIGNIFICANT FIGURES.

3. Round off the calculated number to the number of significant figures in Step 2.

7. 1.64 × 32.05 8. 32.08 ÷ 16.4

9. 0.04076 × 11.765 10. 204.789 ÷ 0.040630

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