Question

proszę o pomoc bo tego nie umiem ​

Answer 1

Verified answer

Odpowiedź:

Szczegółowe wyjaśnienie:

Zad 15

a)

3/7 liczby 28 to 3/7 * 28 = 84/7 = 12

b)

1/3 liczby 3 3/4 to  1/3 * 3 i 3/4 = 1/3 * 15/4 = 15/12 = 1 i 3/12 = 1 i 1/4

c)

1 1/7 liczby 2 1/4 to 1 1/7 * 2 1/4 = 8/7 * 9/4 = 72/28 = 2 i 16/28 = 2 i 4/7

Zad 16

1 3/4 * 1 1/7 - 3 : 4 1/2 = 7/4 * 8/7 - 3 : 9/2 = 56/28 - 3 * 2/9 = 2 - 6/9 = 1 i 3/9 = 1 i 1/3

1 5/7 * (2 3/4 - 1 2/3 : 4) = 12/7 * (11/4 - 5/3 * 1/4) = 12/7 * (33/12 - 5/12) = 12/7 * 28/12 = 336/84 = 4

3 1/3 * (2 1/4 - 1 1/2 : 5) = 10/3 * (9/4 - 3/2 * 1/5) = 10/3 * (9/4 - 3/10) = 10/3 * (45/20 - 6/20) = 10/3 * 39/20 = 390/60 = 6 i 30/60 = 6 i 1/2

(3 1/4 + 1/2) / [3 1/3 * (1 5/6 - 1 1/12) = (3 1/4 + 2/4) : [10/3 * (1 10/12 - 1 1/12)] = 3 3 i 3/4 : (10/3 * 9/12) = 15/4 : 90/36 = 15/4 * 36/90 = 15/4 * 2/5 = 30/20 = 3/2 = 1 i 1/2