21

💡

7

10

1 / 11

1. 7
2. K
3. A

1. 1
2. 2
3. 3

💡

1. ➕
2. ✋
3. ⏫
4. 🔀

21

✓

✗

10 + 8 + 7 = 25 ✗

⚠️

H17

⇄

S17

25 ✗

13 ✓

💡

+10

−10

0

+20

−20

3:2+15

11 + 10 = 21 → +15

6:5+12

1:1+10

💡

⚠️

💡

✓

✗

🔎

💡

⚠️

 9

16

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

💡