onvert to scientific notation: \( 0.025=\square \)

8. Say whether each of the following is true or false: a) \( 15+6=6+15 \) b) \( 15-6=6-15 \)

314. Найдите, используя алгоритм: \( \begin{array}{ll}\text { а) НОК }(6 ; 18) ; & \text { г) НОК }(3 ; 23) \text {; } \\ \text { боК }(80 ; 20) ; & \text { д) HOK }(5 ; 12) \text {; } \\ \text { в) НОК }(18 ; 60) ; & \text { е) HOK }(15 ; 7)\end{array} \)

13. \( 3 \frac{1}{4} \div 2 \frac{3}{4} \)

3) Simplifioa y Resolve a) \( \left(-\frac{121}{11}\right)\left(-\frac{22}{4}\right)\left(\frac{1}{1}\right. \) b) \( \left(\frac{150}{25}\right):\left(-\frac{15}{100}\right) \) 4) a) \( \left(1-\frac{4}{8}\right)\left(\frac{16}{4}\right)- \) b) \( \sqrt{\frac{25}{100}}-\left(\frac{1}{4}\right)^{-2}+ \)

El orden creciente de las fracciones \( \frac{1}{3}, \frac{1}{4} \) y \( \frac{1}{5} \) es: \( \begin{array}{llll}\text { A) } \frac{1}{3}, \frac{1}{4}, \frac{1}{5} & \text { B) } \frac{1}{5}, \frac{1}{4}, \frac{1}{3} & \text { C) } \frac{1}{3}, \frac{1}{5}, \frac{1}{4} & \text { D) } \frac{1}{5}, \frac{1}{3}\end{array} \)