400-1.2

Set up the subtraction problem in long subtraction format.

4 | 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 | ||||

4 | 0 | 0 | |||

– | 1 | . | 2 | ||

. |

Subtract 2 from 10.

-1 | 10 | ||||

4 | 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.

-1 | 9 | 10 | |||

4 | 0 | 0 | |||

– | 1 | . | 2 | ||

. | 8 |

Subtract 1 from 9.

-1 | 9 | 10 | |||

4 | 0 | 0 | |||

– | 1 | . | 2 | ||

8 | . | 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.

3 | 9 | 9 | 10 | ||

4 | 0 | 0 | |||

– | 1 | . | 2 | ||

8 | . | 8 |

Subtract 0 from 9.

3 | 9 | 9 | 10 | ||

4 | 0 | 0 | |||

– | 1 | . | 2 | ||

9 | 8 | . | 8 |

Subtract 0 from 3.

3 | 9 | 9 | 10 | ||

4 | 0 | 0 | |||

– | 1 | . | 2 | ||

3 | 9 | 8 | . | 8 |

3 | 9 | 9 | 10 | ||

4 | 0 | 0 | |||

– | 1 | . | 2 | ||

3 | 9 | 8 | . | 8 |

The result of 400-1.2 is 398.8.

398.8

Evaluate 400-1.2