3 + 2 = 5 → ✓ ✓ ✓ ✓ ✓ ✓

⚠️

A

B ♠ B

A

…

›

💡

0 1 2 3 4 5 … 13

3 + 2 = 5

1. ♠
2. 0
3. 0×2

⚠️

✗

›

✓

›

💡

✗

✓

⚠️

5 × 10 + 1 = 51

5 × 10 = −50

0 → +100 / −100

✓✓ ✓✓ ✓✓ ✓✓ ✓✓ = −100

🔎

♠ ⏱ XP

♠ 3 · 2 · 0 · 4

🙂 2

↩︎ 💡 ☰

1. 1
2. 2
3. 3
4. 4
5. 5

1. 4
   

1. 8
   8 · 4

💡

🌐

51 → −50 → 140 → 500

💡