Question

нужно выполнить все действия​

Answer 1

Ответ:

Пошаговое объяснение:

а) (1 3/7 - 2 1/4) * 3 1/3 = - 2 31/42

1)  (1 3/7 - 2 1/4) = ( 10/7 - 9/4) = (40/28 - 63/28) = - 23/28

2) - 23/28 * 3 1/3 = - 23/28 * 10/3 = - 230 /84 = - 2 31/42

б) (2 1/3 + 3 1/2) : ( - 4 1/6+ 3 1/7) + 7 1/2 = 1 69/86

1) 2 1/3 + 3 1/2 = 7/3 + 7/2 = 14/6 + 21/6 = 35/6

2) - 4 1/6+ 3 1/7 = - 25/6 + 22/7 = -175/42 + 132/42 = - 43/42

3) 35/6 : (- 43/42) = 35/6 * (-42/43) = -245/43 = -5 30/43

4) -5 30/43 + 7 1/2 = -245/43 + 15/2 = - 490/86 + 645/ 86 = 155/86 =

=  1 69/86  

в) (13 1/4 - 2 5/27 - 10 5/6) * 230 1/25 + 46 3/4))/( 1 3/7 + 10/3) : ( 12 1/3 -

- 14 2/7)=  -41

1) 13 1/4 - 2 5/27 = 13 27/108 - 2 20/108 = 11 7/108

2) 11 7/108 - 10 5/6 = 11 7/108 - 10 90/108 = 1195/108 - 1170/108 = 25/108

3) 25/108 * 230 1/25 = 25/108 * 5751/25 = 5751/108 = 53,25

4) 53,25 + 46,75 = 100

5) 1 3/7 + 10/3 = 10/7 + 10/3 = 30/21 + 70/21 = 100/21

6) 12 1/3 - 14 2/7 = 37/3 - 100/7 = 259/21 - 300/21 = - 41/21

7) 100/21 : (- 41/21) = 100/21 * ( - 21/41) = - 100/41

8) 100 : (- 100/41) = 100 * ( - 41/100) = -41