Question

Oblicz:
3 3/7 - 4 5/21 - 2 3/14 =
2 1/8 - (1 2/7 - 3 1/28) =
14/39 x 5/10 : 13/28 =
2 1/16 x 2 2/11 =
62/15 : 93/25 =
3 3/8 : 2 1/4 =
2 2/5 x (-1 7/8) =
-6/7 : (-2 2/3) x 1 5/9
-12/17 : (-3 1/5) x (-3 7/9) =
-1 1/8 : (-1 1/5 x 15/16) =
2 5/8 : (-4 1/12 : 9 1/3) =

znaki:

x = znak mnożenia
: = znak dzielenia
/ = np: 1/2 to że 1 część z 2
- na początku działania to ujemna liczba

Daje naj prosze o szybką odpowiedź 20 punktów to chyba odpowiednie wynagrodzenie :)

Answer 1

3 3/7 - 4 5/21 - 2 3/14 = 3 18/42 - 4 10/42 - 2 9/42 = 3 18/42 - 6 19/42 = -3 1/42 

2 1/8 - (1 2/7 - 3 1/28) = 2 1/8 - ( 1 8/28 - 3 1/28) = 2 1/8 -(1 8/28 -2 29/28) =
= 2 1/8 - (-1 21/28) = 2 7/56 + 1 42/56 = 3 49/56 = 3 7/8

14/39 * 5/10 : 13/28 = 7/39 * 5/5 * 28/13 = 7/39 * 1 * 28/13 = 196/507 

2 1/16 * 2 2/11 = 33/16 * 24/11 = 3/4 * 6/1 = 18/4 = 4 2/4 = 4 1/2

62/15 : 93/25 = 62/15 * 25/93 = 2/3 * 5/3 = 10/9 = 1 1/9 

3 3/8 : 2 1/4 = 27/8 : 9/4 = 27/8 * 4/9 = 3/2 * 1/1 = 3/2 = 1 1/2 

2 2/5 * (-1 7/8) = 12/5 * (-15/8) = 3/1 * (-3/2) = -9/2 = - 4 1/2 

-6/7 : (-2 2/3) * 1 5/9 = -6/7 : (-8/3) * 14/9 = -6/7 * (-3/8) * 14/9 = 
-3/1 * (-1/4) * 2/3 = 6/12 = 1/2 

-12/17 : (-3 1/5) *(-3 7/9) = -12/17 : (-16/5) *(-34/9) = -12/17 *(-5/16) *(-34/9) =
= 4/1 * 5/16 * 2/3 = 40/48 = 5/6

-1 1/8 : (-1 1/5 * 15/16) = -9/8 : (-6/5 * 15/16) = -9/8 : (-3/1 * 3/8) =
= -9/8 : (-9/8)=  -9/8 * (-8/9) = -1/1 * (-1/1) =  1 

2 5/8 : (-4 1/12 : 9 1/3) = 21/8 : (-49/12 : 28/3) = 21/8 : (-49/12 * 3/28) =
= 21/8 : (-7/4 * 1/4) = 21/8 : (-7/16) = 21/8 * (-16/7) = 3/1 * (-2/1) = -6