1 + 4 = 5 2 + 5 = 12 3 + 6 = 21 5 + 8 = .......

Materi Logika

1 + 4 = 5
(1 × 4) + 1 = 5

2 + 5 = 12
(2 × 5) + 2 = 12

3 + 6 = 21
(3 × 6) + 3 = 21

5 + 8 = .........
(5 × 8) + 5 = 45

Semoga bermanfaat ;)