Найти значения выражения 1) 18*(-9)^-1 2) 0,5^-2+(1/4)^-1 3)10^2*(1/50)^-1

(-1/7 + 1. 2/3 ) * 131,25 = 200 1) -1/7 + 1. 2/3 = 1+(-1/7 + 2/3) = 1 + (-3/21 + 14/21) = 1. 11/21 = 32/21 2) 32/21 * 131,25 = 32/21 * 131. 1/4 = 32/21 * 525/4 = 8 * 25 = 200