Description: 4 times 4 equals 16. (Contributed by Mario Carneiro, 19-Apr-2015)
Ref | Expression | ||
---|---|---|---|
Assertion | 4t4e16 | |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | 4nn0 | |
|
2 | 3nn0 | |
|
3 | df-4 | |
|
4 | 4t3e12 | |
|
5 | 1nn0 | |
|
6 | 2nn0 | |
|
7 | eqid | |
|
8 | 4cn | |
|
9 | 2cn | |
|
10 | 4p2e6 | |
|
11 | 8 9 10 | addcomli | |
12 | 5 6 1 7 11 | decaddi | |
13 | 1 2 3 4 12 | 4t3lem | |