Question

11. Oblicz.
a) 1/4-1/3-1/6:1/-1/5-1/10
b) 9/5:3/7-3 3/4 × 2/5: 5 1/4× 3/7​

Answer 1

Odpowiedź:

a)

1/4 - 1/3 - 1/6 : 1/-1/5 - 1/10 = 3/12 - 4/12 - 1 * (-5) - 1/10 = -1/12 + 5 - 1/10 =

= -5/60 - 6/60 + 5 = -11/60 + 5 = 4 49/60

b)

9/5 : 3/7 - 3 3/4 × 2/5 : 5 1/4 ×  3/7 = 9/5 * 7/3 - 15/4 * 2/5 : 21/4 * 3/7 =

= 21/5 - 3/2 * 4/21 * 3/7 = 4 1/5 - 2/7 * 3/7 = 4 1/5 - 6/49 = 4 49/245 - 30/245 =

= 4 19/245

Szczegółowe wyjaśnienie: