Odpowiedź:
1/2 - 2/5 = 5/10 - 4/10 = 1/10
2 × 11/12 - 4/9 = 22/12 - 4/9 = 66/36 - 16/36 = 50/36 = 25/18 = 1 7/18
9 × 5/9 - 2× 4/5 = 45/9 - 8/5 = 5 - 8/5 = 5 - 1 3/5 = 3 2/5
4 × 2/11 - 2 × 2/3 = 8/11 - 4=3 = 24/33 - 44/33 = -20/33
8/7 - 2/3 = 24/21 - 14/21 = 10/21
10 × 13/15 - 5/6 = 130/15 - 5/6 = 520/60 - 50/60 = 470/60 = 47/60
8 × 3/8 - 7 × 5/6 = 24/8 - 35/6 = 72/24 - 140/24 = -68/24 = -17/6 = -2 5/6
7 × 1/3 - 4 × 20/21 = 7/3 - 80/21 = 49/21 - 80/21 = -31/21
3/4 - 2/9 = 27/36 - 8/36 = 19/36
11 × 1/4 - 5/8 = 11/4 - 5/8 = 22/8 - 5/8 = 17/8 = 2 1/8
15 × 1/11 - 6 × 3/4 = 15/11 - 18/4 = 60/44 - 198/44 = -138/44 = -69/22
6 × 3/7 - 5 × 4/5 = 18/7 - 20/5 = 90/35 - 140/35 = -50/35 = -10/7 = -1 3/7
7/12 - 4/15 = 35/60 - 16/60 = 19/60
15 × 1/2 - 4 × 3/4 = 15/2 - 12/4 = 30/4 - 12/4 = 18/4 = 9/2
= 4 1/2
24 × 5/13 - 14 × 2/3 = 95/13 - 28/3 = 285/39 - 364/39 = -79/39 = -2 1/39
17 × 11/13 - 12 × 3/4 = 187/13 - 36/4 = 748/52 - 468/52 = 280/52 = 140/26 = 70/13 = 5 5/13
Szczegółowe wyjaśnienie:
Pewnie są błędy bo robiłam to o 23 więc sorki
