# Subtract the numbers: 91 - 90 = ? Calculate the numbers difference and learn how to do the subtraction, column subtracting method, from right to left

## The operation to perform: 91 - 90

### Stack the numbers on top of each other.

#### The tens digits line up in the next column to the left.

 9 1 - 9 0 ?

## Subtract column by column; start from the column on the right

### Subtract the digits in the ones column:

#### 1 - 0 = 1. 1 is the ones digit. Write it down at the base of the ones column.

 9 1 - 9 0 1

### Subtract the digits in the tens column:

#### 9 - 9 = 0. 0 is the tens digit. Write it down at the base of the tens column.

 9 1 - 9 0 0 1

## The latest numbers that were subtracted

 91 - 90 = ? Aug 13 19:29 UTC (GMT) 1,018 - 1,079 + 973 - 776 + 405 + 554 = ? Aug 13 19:28 UTC (GMT) 876 + 1,909 - 454 - 241 = ? Aug 13 19:28 UTC (GMT) - 385 - 72 - 133 + 69 - 109 + 84 + 147 = ? Aug 13 19:28 UTC (GMT) - 478 - 160 + 215 - 139 - 171 - 152 + 237 = ? Aug 13 19:27 UTC (GMT) 901 + 1,874 - 456 + 247 = ? Aug 13 19:27 UTC (GMT) - 484 + 3,062 - 18,428 - 303 + 98 = ? Aug 13 19:27 UTC (GMT) - 935 + 1,950 - 496 - 309 = ? Aug 13 19:27 UTC (GMT) - 915 + 377 = ? Aug 13 19:26 UTC (GMT) 265 - 191 + 311 - 162 + 729 = ? Aug 13 19:26 UTC (GMT) - 434 + 3,035 + 18,393 - 249 - 87 = ? Aug 13 19:26 UTC (GMT) - 970 - 2,003 + 530 - 376 = ? Aug 13 19:26 UTC (GMT) - 375 - 392 - 316 + 571 - 436 = ? Aug 13 19:26 UTC (GMT) All the numbers that were subtracted by users