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21. Oblicz: a) :6 d) 1 b) 12: c c) d) 13 e) 25:1 1) 55:31 3.5 10.3 22. Oblicz: 13 40 a) 4. 25. 2. b) 6-4.3.3 c) 13.2.3.2 b

Plis pomóżcie ​

21 Oblicz A 6 D 1 B 12 C C D 13 E 251 1 5531 35 103 22 Oblicz 13 40 A 4 25 2 B 6433 C 13232 BPlis Pomóżcie class=

Odpowiedź :

Odpowiedź:

3/5 : 6 = 3/5 * 1/6 = 1/10

12 : 1/3 = 12 * 3/1= 36

3/10 : 5/8 = 3/10 * 8/5 = 24/50 = 12/25

1 i 7/8 : 3/4 = 15/8 * 4/3 = 5/2 = 2 i 1/2

2 i 5/9 : 1 i 1/3 = 23/9 : 4/3 = 23/9 * 3/4 = 23/12 = 1 i 11/12

5 i 5/6 : 3 i 1/2 = 35/6 : 7/2 = 35/6 * 2/7 = 5/3 = 1 i 2/3

zad 22

4 * 15/26 * 2 * 13/40 = 60/26 * 2 * 13/40 = 60/13 * 13/40 = 3/2 = 1 i 1/2

6 * 21/24 * 2/7 * 3 = 21/4 * 2/7 * 3 = 3/2 * 3 = 9/2 = 4 i 1/2

1 i 1/5 * 2 * 1/3 * 2 i 1/4 = 6/5 * 2 * 1/3 * 9/4 = 12/5 * 1/3 * 9/4 = 4/5 * 9/4 = 9/5 = 1 i 4/5

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