Description: 6 - 1 = 5. (Contributed by AV, 6-Sep-2021)
Ref | Expression | ||
---|---|---|---|
Assertion | 6m1e5 | |- ( 6 - 1 ) = 5 |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | 5cn | |- 5 e. CC |
|
2 | ax-1cn | |- 1 e. CC |
|
3 | df-6 | |- 6 = ( 5 + 1 ) |
|
4 | 1 2 3 | mvrraddi | |- ( 6 - 1 ) = 5 |