Description: 5 times 2 equals 10. (Contributed by NM, 5-Feb-2007) (Revised by AV, 4-Sep-2021)
Ref | Expression | ||
---|---|---|---|
Assertion | 5t2e10 | ⊢ ( 5 · 2 ) = ; 1 0 |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | 5nn0 | ⊢ 5 ∈ ℕ0 | |
2 | 1nn0 | ⊢ 1 ∈ ℕ0 | |
3 | df-2 | ⊢ 2 = ( 1 + 1 ) | |
4 | 5cn | ⊢ 5 ∈ ℂ | |
5 | 4 | mulid1i | ⊢ ( 5 · 1 ) = 5 |
6 | 5p5e10 | ⊢ ( 5 + 5 ) = ; 1 0 | |
7 | 1 2 3 5 6 | 4t3lem | ⊢ ( 5 · 2 ) = ; 1 0 |