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. |
2 |

Logarithms |
Use the same number of |
log |

Antilogarithms |
Use the same number of |
10 |