Задача 900-a=340+139

Question

Задача 900-a=340+139

Comments

900-a=340+349

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900-a=479

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a=900-479

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a=421

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900-421=340+349

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479=479

Answer 1

340+139 = 479
а = 900 - 479
а = 521

Answer 2

1. 340+139=449
2. 900-449= 451


900-451=340+139

Comments

Молодец)