1)10920:39=280
2)608*34=20672
3)280+20672=20952
18:1*4= 72
55:1*20=1100
7:7*200=200
9\5=1,8. 1,8:9*100=20
16:1*4=64
48:3*50=800
Ответ:
19/45
0,1
25/90
Пошаговое объяснение:
3/5–1/8 = 24/45–5/45= 19/45
54/60–32/40=108/120–96/120= 12/120=1/10=0,1
13/30–(2/45+1/9)= 13/30– (2/45+5/45) = 13/30–7/45= 39/90–14/90= 25/90