Question

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Выберите пары взаимно обратных чисел:
а) (0, 05×2/3) ×20=
б) 5/12×(2/3×12/5) =
в) 1/2×(2,56×2) =
г) 7/13×(35/43×13/7) ×43/35=
д) 0,125×(3/25×6/9) ×8=
е) 7/4×(17/76×4/7)×19/34=​

Answer 1

Ответ:

Нет взаимно простых чисел

Пошаговое объяснение:

а)

(0,05 * 2/3) * 20 = (5/100 * 2/3) * 20 = 10/300 * 20 =

1/30 * 20 = 20/30 = 2/3

б)

5/12 * (2/3 * 12/5) = 5/12 * 24/15 = 1/1 * 2/3 = 2/3

в)

1/2 * (2,56 * 2) = 1/2 * 5,12 = 1/2 * 512/100 = 1/1 = 256/100 = 64/25

г)

7/13 * (35/43 * 13/7) * 43/35 = 7/13 * (5/43 * 13/1) * 43/35 = 7/13 * 65/43 * 43/35 = 7/1 * 5/43 * 43/35 = 35/43 * 43/35 = 1

д)

0,125 * (3/25 * 6/9) * 8 = 0,125 * (1/25 * 6/3) * 8 =

125/100 * 6/75 * 8 = 5/50 * 3/3 * 8 = 1/10 * 1 * 8 = 8/10 = 4/5

е)

7/4 * (17/76 * 4/7) * 19/34 = 7/4 * (17/19 * 1/7) * 19/34 =

7/4 * 17/133 * 19/34 = 7/4 * 1/7 * 1/2 = 7/56 = 1/8