4 ms·

How do you know that 800 × 3 = 2400 if you haven't learned multiplication tables?

• alvarlagerlof 5y ago
  Addition
• johnaspden 5y ago
  (8+8+8)*100
• gavinray 5y ago
  8 x 3 = 24 8 x 300 = 2400 Add two zeros
  • xigoi 5y ago
    I meant, how do you know 8 × 3 without a multiplication table?
    • gavinray 5y ago
      Ah I see what you mean In my head, I do this: 8 + 8 = 16 16 + 8 = 24