Examples
[4230]-[1321][4230]−[1321]
Step 1
Subtract the corresponding elements.
[4-12-33-20-1][4−12−33−20−1]
Step 2
Step 2.1
Subtract 11 from 44.
[32-33-20-1][32−33−20−1]
Step 2.2
Subtract 33 from 22.
[3-13-20-1][3−13−20−1]
Step 2.3
Subtract 22 from 33.
[3-110-1][3−110−1]
Step 2.4
Subtract 11 from 00.
[3-11-1][3−11−1]
[3-11-1][3−11−1]