100-12

Set up the subtraction problem in long subtraction format.

1 | 0 | 0 | |

– | 1 | 2 |

Borrow 10 from the digit in the next column to the left. Add the borrowed 10 to 0. Reduce the number that was borrowed from by 1.

-1 | 10 | ||

1 | 0 | 0 | |

– | 1 | 2 |

Subtract 2 from 10.

-1 | 10 | ||

1 | 0 | 0 | |

– | 1 | 2 | |

8 |

Borrow 10 from the digit in the next column to the left. Add the borrowed 10 to -1. Reduce the number that was borrowed from by 1.

0 | 9 | 10 | |

1 | 0 | 0 | |

– | 1 | 2 | |

8 |

Subtract 1 from 9.

0 | 9 | 10 | |

1 | 0 | 0 | |

– | 1 | 2 | |

8 | 8 |

Subtract 0 from 0.

0 | 9 | 10 | |

1 | 0 | 0 | |

– | 1 | 2 | |

0 | 8 | 8 |

0 | 9 | 10 | |

1 | 0 | 0 | |

– | 1 | 2 | |

0 | 8 | 8 |

The result of 100-12 is 88.

88

Evaluate 100-12