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

Method used below: column subtracting, from right to left (traditional)


Stack the numbers on top of each other.

The ones digits line up in the first column from the right.

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


 91
- 90

?

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.


 91
- 90

  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.


 91
- 90

 01

Leading zeros

When leading zeros occupy the most significant digits of a natural number, they could be left blank and the numeric value stays the same:

01 = 1

Final answer:
91 - 90 = 1

How to subtract the numbers:
96 - 96 = ?


Subtraction Calculator: Subtract Numbers & Learn to Calculate the Difference

1. Stack the numbers on top of each other. 2. Subtract column by column starting from the column on the right.

The latest numbers that were subtracted