Oblicz: a) 4/7+ ¾= b) 3 2/7 - 1 5/7= c) 5/12+ 9/20= d) ⅗: 4/7=​

Odpowiedź :

Odpowiedź:

4/7 + 3/4 = 16/28 + 21/28 = 37/28 = 1 i 9/28

3 i 2/7 - 1 i 5/7 = 2 i 9/7 - 1 i 5/7 = 1 i 4/7

5/12 + 9/20 = 25/60 + 27/60 = 52/60 = 26/30 = 13/15

3/5 : 4/7 = 3/5 * 7/4 = 21/20 =  1 i 1/20