Question

Uch dodaje jeszcze raz bo tam coś źle wyszło :(

/ to ułamek np. 3/5 to ⅗

Oblicz

1 i 3/5 - 2 i 1/6 =

3 i 3/8 - 2 i 5/6 =

1/2 -(-1/6-1/3) =

7/6 + ( -5/4 - 4/3) =

-(-2 i 2/3 ) + 7/15 =

-1 i 9/6 + 11/12 =

1 i 5/8 - ( -2 i 2/3 + 0,25) =

1 i 2/5 - 3 i 7/8 - 0,125 =

Answer 1

W każdym przypadku należy doprowadzić ułamki do postaci ułamka zwykłego i sporowadzić je do wspólnego mianownika.

 

1 i 3/5 - 2 i 1/6 = 8/5 - 13/6 = 48/30 - 65/30 = - 17/30

 

3 i 3/8 - 2 i 5/6 = 27/8 - 17/6 = 81/24 - 68/24 = 13/24

 

1/2 -(-1/6-1/3) = 1/2 - (-1/2) = 1/2 + 1/2 = 1

 

7/6 + ( -5/4 - 4/3) = 7/6 + (-15/12 - 16/12) = 14/12 - 31/12 = - 17/12 = -1 i 5/12

 

-(-2 i 2/3 ) + 7/15 = 8/3 + 7/15 = 40/15 + 7/15 = 47/15 = 3 i 2/15

 

-1 i 9/6 + 11/12 = = -15/6 + 11/12 = -30/12 + 11/12 = - 19/12 = -1 i 7/12

 

1 i 5/8 - ( -2 i 2/3 + 0,25) = 13/8 - (-8/3 + 1/4) = 13/8 - (-32/12 + 3/12) = 13/8 + 29/12 = 39/24 + 58/24 = 97/24 = 4 i  1/24

 

 

1 i 2/5 - 3 i 7/8 - 0,125 = 7/5 - 31/8 - 1/8 = 56/40 - 155/40 - 5/40 = - 104/40 = -2 i 24/40 = -2 i 3/5