Question

Номера: 520,521,522,523

Answer 1

520
2/3 - 1/5 = (2*5 - 1*3)/15 = (10 - 3)/15 = 7/15
3/4 + 1/10 = (3*5 + 1*2)/20 = (15 + 2)/20 = 17/20
5/8 - 3/10 =( 5*5 - 3*4)/40 = (25 - 12)/40 = 13/40
521
1/6 + 1/8 = (1*4 + 1*3)/24 = (4 + 3)/24 = 7/24
5/8 - 1/3 = (5*3 - 1*8)/24 = (15 - 8)/24 = 7/24
2/3 + 3/10  = (2*10 + 3*3)/30 = (20 + 9)/30 = 29/30
522
3/4 - 2/7  = (3*7 - 2*4)/28 = (21 - 8)/28 = 13/28
1/2 + 3/7 = (1*7 + 3*2)/14 = (7 + 6)/14 = 13/14
2/9 + 3/7 =(2*7 + 3*9)/63 = (14 + 27)/63 = 41/63
523
9/10 - 1/15 =(9*3 - 1*2)/30 = (27 - 2)/30 = 25/30 = 5/6
5/16 + 5/12 = (5*3 + 5*4)/48 = (15 + 20)/48 = 35/48
2/15 + 3/20 = (2*4 + 3*3)/60 = (8 + 9)/60 = 17/60

Answer 2

СПАСИБО!!!

Answer 3

пожалуйста