1) Вычислить: 1) 0.4√6400 2) 100√0.16 - 1/26 √169 3) 2/9 √5 √1/16 4) √784 - 10√2.56 5) 2.5 - √3.24 - 1/2 √225 6) 4 - 1/4 √5 √11/49

Решение: 1) 0.4√6400 = 0.4 * 80 = 32; 2) 100√0.16 - 1/26 √169 = 100 * 0.4 - 1/26 * 13 = 40 - 0.5 = 39.5; 3) 2/9 √5 √1/16 = 2/9 * √(5/16) = 2/9 * √(5)/4 = (2√5)/36; 4) √784 - 10√2.56 = 28 - 10 * 1.6 = 28 - 16 = 12; 5) 2.5 - √3.24 - 1/2 √225 = 2.5 - 1.8 - 7.5 = -6.8; 6) 4 - 1/4 √5 √11/49 = 4 - 1/4 * √(55/49) = 4 - 1/4 * √(55)/7 = 4 - √55/28.