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Ответ

Ответ дан
det0
Первый:

30*40 3*4 12
——— Можно сократить все по 10 ——— = —-
50*80 5*8 40


Второй:

36 3 3
——— можно сократить 36 и 48 по 12 ——— = ——-
48*52 4*52 208

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