а) 18 + 20% = 18 + 0.2018 = 18 + 3.6 = 21.6б) 18 + 455 = 473в) 18 + 130% = 18 + 0.3018 = 18 + 23.4 = 41.4
а) 30,(8) - 10% = 30,(8) - 0.1030,(8) = 30,(8) - 3,(08) = 27,(72)б) 30,(8) - 62% = 30,(8) - 0.6230,(8) = 30,(8) - 18,(976) = 11,(824)в) 30,(8) - 90% = 30,(8) - 0.90*30,(8) = 30,(8) - 27,(72) = 3,(08)
а) 18 + 20% = 18 + 0.2018 = 18 + 3.6 = 21.6
б) 18 + 455 = 473
в) 18 + 130% = 18 + 0.3018 = 18 + 23.4 = 41.4
а) 30,(8) - 10% = 30,(8) - 0.1030,(8) = 30,(8) - 3,(08) = 27,(72)
б) 30,(8) - 62% = 30,(8) - 0.6230,(8) = 30,(8) - 18,(976) = 11,(824)
в) 30,(8) - 90% = 30,(8) - 0.90*30,(8) = 30,(8) - 27,(72) = 3,(08)