Question

Oblicz
Proszę również z obliczeniami a nie sam wynik :)
a) 7/3 + 4 1/2 - 1 8/9 =
b) 3 4/7 x 14/5 =
c) 3 3/5 : 6/25 =
d) 1/3 x 2,4 + 4,8 : 2 2/5 =
e) 3 - (2,5 - 1 1/5) x 9/13 =
f) (2/3 x 0,125 + 4,5) : 11/12 =

Answer 1

Odpowiedź:

7/3 + 4 i 1/2 - 1 i 8/9 = 42/18 + 4 i 9/18 - 1 i 16/18 = 4 i 51/18 - 1 i 16/18 = 3 i 35/18 = 4 i 17/18

3 i 4/7 * 14/5 = 25/7 * 14/5 = 10

3 i 3/5 : 6/25 = 18/5 * 25/6 = 15

1/3 * 2,4 + 4,8 : 2 i 2/5 = 1/3 * 24/10 + 48/10 : 12/5 = 1/3 * 24/10 + 48/10 * 5/12 = 8/10 + 4/2 = 8/10 + 20/10 = 28/10 = 2 i 8/10 = 2 i 4/5

3 - (2,5 - 1 i 1/5) * 9/13 = 3 - (25/10 - 1 i 2/10) * 9/13 = 3 - (2 i 5/10 - 1 i 2/10) * 9/13 =  3 - 1 i 3/10 * 9/13 = 3 - 13/10 * 9/13 = 3 - 9/10 = 2 i 10/10 - 9/10 = 2 i 1/10

(2/3 * 0,125 + 4,5) : 11/12 = (2/3 * 125/1000 + 4 i 5/10) : 11/12 = (125/1500 + 4 i 5/10) : 11/12 = (1/12 + 4 i 5/10) : 11/12 = (5/60 + 4 i 30/60) : 11/12 = 4 i 35/60 : 11/12 = 275/60 * 12/11 = 275/55 = 25/5 = 5