correctnumber of significant figures in a different way than you teach in your class.
Operation | Rule | Examples |
---|---|---|
Addition |
Use the fewest number of decimal places specified in any of the operands. |
2.46 + 6.1743 = 8.63 |
Subtraction |
Use the fewest number of decimal places specified in any of the operands. |
3.1415 - 2.2 = 0.9 |
Multiplication |
Use the fewest number of significant figures specified in any of the operands. |
1530 × 4.0 = 6100 |
Division |
Use the fewest number of significant figures specified in any of the operands. |
444 ÷ 4 = 100 |
Exponentiation |
Use the same number of significant figures as the base. |
210 = 1e3 |
Logarithms |
Use the same number of decimal places in the result as the number of significant figures in the number you are taking the logarithm of. |
log10(27) = 1.43 |
Antilogarithms |
Use the same number of significant figures in the result as the number of decimal places in the number you are taking the antilogarithm of. |
103.43 = 2700 |