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Автор - diko8786

вычисли удобным способом помогите пожалуйста ​

Ответ

Автор - говницо

Ответ:

2+9+8=2+8+9

2+8=10 10+9=19

3+8+7=3+7+8

3+7=10 10+8=18

2+10+8=2+8+10

2+8=10 10+10=20

2+9+18=2+18+9

2+18=20 20+9=29

13+8+7=13+7+8

13+7=20 20+8=28

12+8+10

12+8=20 20+10=30

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