1) 77777777777+8289353=77786067130
2) 77786067130+637=77786067767
3) 77786067767-777777778=77008289989
Ответ: 77008289989
[ 384 - 277] x0 = 0
384 - 277= 7
7 x 0 = 0
9 x [ 180 - 179] =9
180 - 179 = 1
9 x 1 = 9
Б) 7.5*79.6=597*0.4=238.8
в) 3*0.13=0.39*0.5=0.195*2=0.39
г)1.2*7.09=8.508*5=42.54*10=425.4