Выполните действия: 73/4 - (45/6-3 1/2) + 12/3; 92/5 - (81/3-71/4+51/6); (65/8-1/2) - (53/4-21/6) + (95/8-71/3); (51/30-23/5-2/15+6) - (7-611/12+1/4);

Question

Тимофей Новиков

Математика

17 сентября, 18:36

Выполните действия: 73/4 - (45/6-3 1/2) + 12/3; 92/5 - (81/3-71/4+51/6); (65/8-1/2) - (53/4-21/6) + (95/8-71/3); (51/30-23/5-2/15+6) - (7-611/12+1/4);

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Варвара Михайлова · Answer 1

а) 73/4 - (45/6 - 3 1/2) + 12/3 = 18, 25 - (7, 5 - 3, 5) + 4 = 18, 25.

1) 7, 5 - 3, 5 = 4.

2) 18, 25 - 4 + 4 = 18, 25.

б) 92/5 - (81/3 - 71/4 + 51/6) = 18, 4 - (27 - 17, 75 + 8, 5) = 0, 65.

1) 27 - 17, 75 = 9, 25.

2) 9, 25 + 8, 5 = 17, 75.

3) 18, 4 - 17, 75 = 0, 65.

в) (65/8 - 1/2) - (53/4 - 21/6) + (95/8 - 71/3) = (8, 125 - 0, 5) - (13, 25 - 3, 5) + (11, 875 - 23, 7) = - 13, 95.

1) 8, 125 - 0, 5 = 7, 625.

2) 13, 25 - 3, 5 = 9, 75.

3) 11, 875 - 23, 7 = - 11, 825.

4) 7, 625 - 9, 75 - 11, 825 = - 13, 95.