Question

помогите, сделайте задание номер 1

Answer 1

а) 59+78=4072+6372=10372
б) 920-512=2360-2560=-260
в)910-(35+16)+23=2730-1830-530-2020=-1620

Answer 2

5/9 + 7/8 = (40+63)/72 = 103/72
9/20 - 5/12 = (45-15)/60 =30/60 = 1/2
9/10 - (3/5 + 1/6) + 2/3 = 9/10 -(18+5)/30+ 2/3 = (27 - 23 + 20)/30 = 24/30 = 4/5