Question

Вычислите рациональным способом
7)
123,45*6,789-678,9*1,2345
8)12,34*567,89-56,789*123,4

Answer 1

123,45*6,789-678,9*1,2345 =123,45*6,789-6,789*123,45 =0
8)12,34*567,89-56,789*123,4=12,34*567,89-567,89*12,34=12,34*567,89(1-1)=0