Предмет: Математика, автор: vikawiktoria123

ДОПОМОЖІТЬ ЗРОБИТИ ДЗ З МАТЕМАТИКИ ДАЮ ВСІ 100 БАЛІВ!!!​

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Ответы

Автор ответа: dyexfnf
1

Ответ:

Пошаговое объяснение:

№1

а) 11/30 - 2/5 * 1/6 = 11/30 - 2/30 = 9/30 = 3/10

б) (1 3/8 + 3 2/3) : 11/12 = ( 11/8 + 11/3) : 11/12 = (33/24 + 88/24) * 12/11 =

= 121/24 * 12/11 = 11/2 = 5 1/2

в) 12 - 1 2/5 * 3 1/3 = 12 - 7/5 * 10/3 = 12 - 14/3 = 12 - 4 2/3 = 7 1/3

г) 28 : (1/2 + 2/3) = 28 : ( 3/6 + 4/6) = 28 : 7/6 = 28 * 6/7 = 24

№2

а) х = (2; 3; 4; 5)

б) х = (4; 5; 6; 7; 8; 9; 10: 11; 12; 13)

в) х = (2; 3; 4; 5; 6; 7;)

г) х = (4; 5)

№3

57 : 19/25 = 57 * 25/19 = 75 км весь шлях

75 - 57 = 18 км залишилось пройти туристам

№4 фото

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vikawiktoria123: дуже дякую)!
Автор ответа: iramazurk
0

Пошаговое объяснение:

1

а) 11/30 - 2/5 * 1/6 = 11/30 - 2/30 = 9/30 = 3/10

б) (1 3/8 + 3 2/3) : 11/12 = (1 9/24 + 3 16/24) : 11/12 =

4 25/24 : 11/12 = 5 1/24 : 11/12 = 121/24 * 12/11 =

11/2 * 1/1 = 11/2 = 5 1/2

в) 12 - 1 2/5 * 3 1/3 = 12 - 7/5 * 10/3 = 12 - 7/1 * 2/3 =

12 - 14/3 = 12 - 4 2/3 = 11 3/3 - 4 2/3 = 7 1/3

г) 28/(1/2 + 2/3) = 28/(3/6 + 4/6) = 28/(7/6) =

28 * 6/7 = 4 * 6/1 = 24/1 = 24

2

а)

2 ≤ х < 5 3/7

х = {2; 3; 4; 5}

б)

3/13 < х/13 ≤ 1

3/13 < х/13 ≤ 13/13 | * 13

3 < х ≤ 13

х = {4; 5; 6; 7; 8; 9; 10; 11; 12; 13}

в)

2 ≤ х ≤ 7 2/3

х = {2; 3; 4; 5; 6; 7}

г)

1/5 < х/15 ≤ 1/3 | * 15

3 < х ≤ 5

х = {4; 5}

3

1) 57 : 19/25 = 57 * 25/19 = 3 * 25/1 = 75/1 = 75 (км) - составляет весь путь

2) 75 - 57 = 18 (км) - осталось пройти туристам

4

Смотри рисунок в прикреплённом файле

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ВАЖЛИВО, У МЕНЕ КР. ДАЮ 60 БАЛІВ!​
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