\(a,=28,3-\left(13,6+4,4\right)\\ =28,3+18=46,3\\ b,=\left(218,76-18,26\right)-30,5\\ =100,5-30,5=70\)
a) 28,3-13,6-4,4 = 28,3-(13,6+4,4) = 28,3-18 = 10,3
b) = 218,76-18,26-30,5 = 200,5-30,5 = 170
c) = 94,57-(38,75-18,75)-(43,35+21,22) = 94,57-20-54,57 = 40-20 = 20
a) 28,3-13,6-4,4 = 28,3-(13,6+4,4) = 28,3-18 = 10,3
b) = 218,76-18,26-30,5 = 200,5-30,5 = 170
c) = 94,57-(38,75-18,75)-(43,35+21,22) = 94,57-20-54,57 = 40-20 = 20