Question

oblicz zad 6 str 42 klasa 5 ćwiczenie​

Answer 1

Odpowiedź:

2/3 + 3/7 = 14/21 + 9/21 = 23/21 = 1 i 2/21

5/6 + 8/9 = 15/18 + 16/18 = 31/18 = 1 i 13/18  

3 3/4 + 1/6 = 3 9/12 + 2/12 = 3 i 11/12

2 i 8/9 + 1 i 7/10 = 2 i 80/90 + 1 i 63/90 = 3 i 143/90 = 4 i 53/90

4 i 5/9 + 5 i 1/6 = 4 i 10/18 + 5 i 3/18 = 9 i 13/18

3/4 - 2/5 = 15/20 - 8/20 = 7/20

7/8 - 3/5 = 35/40 - 24/40 = 11/40

2 i 5/6 - 3/4 = 2 i 10/12 - 9/12 = 2 i 1/12

5 i 7/9 - 1 i 1/2 = 5 i 14/18 - 1 i 9/18 = 4 i 5/18

7 i 5/6 - 3 i 4/5 = 7 i 25/30 - 3 i 24/30 = 4 i 1/30

2 i 1/4 - 2 i 1/6 = 2 i 3/12 - 2 i 2/12 = 1/12