Question

Pliss wszystko w załączniku z góry dzieki

Answer 1

/ - kreska ułamkowa
* - znak mnożenia
: - znak dzielenia

1. 2/5 + 4/6 = ( wspólny licznik to 30 ) 12/30 + 20/30 = 32/30 = 2/30 = 1/15
2/5 = 12/30
4/6 = 20/30

2. 3/16 + 3/4 = ( wspólny mianownik to 16 ) 3/16 + 12/16 = 15/16
3/4 = 12/16

3. 1 5/6 + 2 4/7 = ( wspólny mianownik to 42 ) 1 35/42 + 2 24/42 = 3 59/42 =
= 4 17/42
1 5/6 = 1 35/42
2 4/7 = 2 24/42

4. 2 7/9 + 4 5/6 = ( wspólny mianownik to 54 ) 2 42/54 + 4 45/54 = 6 87/54 =
= 7 33/54
2 7/9 = 2 42/54
4 5/6 = 4 45/54

5. 5 3/8 + 12 6/7 = ( wspólny mianownik to 56 ) 5 21/56 + 12 48/56 = 
= 17 69/56 = 18 13/56
5 3/8 = 5 21/56
12 6/7 = 12 48/56

27. 2 2/3 * 1 3/4 = 8/3 * 7/4 = 56/12 = 4 8/12 = 4 2/3
2 2/3 = 8/3
1 3/4 = 7/4

28. 4/5 : 2/9 = 4/5 * 9/2 = 2/5 * 9/1 = 18/5 = 3 3/5

29. 10 : 2 1/3 = 10 : 7/3 = 10 * 3/7 = 30/7 = 4 2/30 = 4 1/15
2 1/3 = 7/3

30. 1 1/3 : 4 = 4/3 : 4 = 4/3 : 4/1 = 4/3 * 1/4 = 1/3 * 1/1 = 1/3
11/3 = 4/3

31. 8 1/6 : 1 3/4 = 49/6 : 7/4 = 49/6 * 4/7 = 7/6 * 4/1 = 7/3 * 2/1 = 14/3 = 4 2/3
8 1/6 = 49/6
1 3/4 = 7/4

14. 7 2/7 - 1 3/4 = ( wspólny mianownik to 28 ) 7 8/28 - 1 21/28 = 6 36/28 - 1 21/28 = 5 15/28
7 2/7 = 7 8/28, 6 36/28
1 3/4 = 1 21/28

15. 5/9 * 9 = 5/9 * 9/1 = 5/1 * 1/1 = 5 * 1= 5
9 = 9/1

16. 2/5 * 4/6 = 1/5 * 4/3 = 4/15

17. 2 3/5 * 10/13 = 13/5 * 10/13 = 1/5 * 10/1 = 1/1 * 2/1 = 2/1 = 2
2 3/5 = 13/5

18. 2 5/27 * 18 = 59/27 * 18/1 = 1062/27 = 39 9/27 = 39 1/3
2 5/27 = 59/27
18 = 18/1

Trochę się napracowałem więc liczę na naj :)
Pozdro ;D