Odpowiedź :
Odpowiedź:
1 - 3/7 = 7/7 - 3/7 = 4/7
1 - 4/5 = 5/5 - 4/5 = 1/5
2 - 3/7 = 1 i 7/7 - 3/7 = 1 i 4/7
3 - 1/3 = 2 i 3/3 - 1/3 = 2 i 2/3
5 - 2/9 = 4 i 9/9 - 2/9 = 4 i 7/9
1-3/7= 7/7-3/7=4/7
1-4/5=5/5-4/5=⅕
2-3/7= 1+1-3/7=1+7/7-3/7=1+4/7=1 4/7
3-1/3=2+1-⅓=2+3/3-⅓=2+⅔=2⅔
5-2/9=4+1-2/9=4+9/9-2/9=4+7/9=4 7/9