а) 1 - 3/4; б) 2 - 5/6; в) 9 - 11/12; г) 7 - 1/8; д) 5 - 2 2/5; е) 6 - 5 5/8; ж) 8 3/11 - 4; з) 5 7/15 - 3/20; и) 1 5/12 - 9/10; к) 6 3/10 - 11/15; л) 5 7/8 - 9/10; м) 7 5/12 - 3 2/9; н) 10 1/2 - 4 9/14; о) 7 4/7 - 5 7/9; п) 2 3/10 - 1 11/15; р) 5 5/8 - 3 5/6.

Решение:

Давай решим эти примеры по порядку!

а) 1 - 3/4 = 4/4 - 3/4 = 1/4

б) 2 - 5/6 = 12/6 - 5/6 = 7/6 = 1 1/6

в) 9 - 11/12 = 108/12 - 11/12 = 97/12 = 8 1/12

г) 7 - 1 1/8 = 7 - 9/8 = 56/8 - 9/8 = 47/8 = 5 7/8

д) 5 - 2 2/5 = 5 - 12/5 = 25/5 - 12/5 = 13/5 = 2 3/5

е) 6 - 5 5/8 = 6 - 45/8 = 48/8 - 45/8 = 3/8

ж) 8 3/11 - 4 = 91/11 - 4 = 91/11 - 44/11 = 47/11 = 4 3/11

з) 5 7/15 - 3/20 = 82/15 - 3/20 = (82 \cdot 4)/(15 \cdot 4) - (3 \cdot 3)/(20 \cdot 3) = 328/60 - 9/60 = 319/60 = 5 19/60

и) 1 5/12 - 9/10 = 17/12 - 9/10 = (17 \cdot 5)/(12 \cdot 5) - (9 \cdot 6)/(10 \cdot 6) = 85/60 - 54/60 = 31/60

к) 6 3/10 - 11/15 = 63/10 - 11/15 = (63 \cdot 3)/(10 \cdot 3) - (11 \cdot 2)/(15 \cdot 2) = 189/30 - 22/30 = 167/30 = 5 17/30

л) 5 7/8 - 9/10 = 47/8 - 9/10 = (47 \cdot 5)/(8 \cdot 5) - (9 \cdot 4)/(10 \cdot 4) = 235/40 - 36/40 = 199/40 = 4 39/40

м) 7 5/12 - 3 2/9 = 89/12 - 29/9 = (89 \cdot 3)/(12 \cdot 3) - (29 \cdot 4)/(9 \cdot 4) = 267/36 - 116/36 = 151/36 = 4 7/36

н) 10 1/2 - 4 9/14 = 21/2 - 65/14 = (21 \cdot 7)/(2 \cdot 7) - 65/14 = 147/14 - 65/14 = 82/14 = 4 18/14 = 5 4/14 = 5 2/7

о) 7 4/7 - 5 7/9 = 53/7 - 52/9 = (53 \cdot 9)/(7 \cdot 9) - (52 \cdot 7)/(9 \cdot 7) = 477/63 - 364/63 = 113/63 = 1 50/63

п) 2 3/10 - 1 11/15 = 23/10 - 26/15 = (23 \cdot 3)/(10 \cdot 3) - (26 \cdot 2)/(15 \cdot 2) = 69/30 - 52/30 = 17/30

р) 5 5/8 - 3 5/6 = 45/8 - 23/6 = (45 \cdot 3)/(8 \cdot 3) - (23 \cdot 4)/(6 \cdot 4) = 135/24 - 92/24 = 43/24 = 1 19/24

Ответ: а) 1/4, б) 1 1/6, в) 8 1/12, г) 5 7/8, д) 2 3/5, е) 3/8, ж) 4 3/11, з) 5 19/60, и) 31/60, к) 5 17/30, л) 4 39/40, м) 4 7/36, н) 5 2/7, о) 1 50/63, п) 17/30, р) 1 19/24

Ты молодец! Продолжай в том же духе, и у тебя всё получится!