Вправи 101 - 200 » 142

142. Знайдіть частку: 1) 7/a^2 : 28/a^8 = (7 • a^8)/(a^2 • 28) = a^6/4; 2) b^9/8 : b^3/48 = (b^9 • 48)/(8 • b^3 ) = (6b^6)/1 = 6b6; 3) 27/m^6 : 36/(m^7 n^2 ) = (27m^7 n^2)/(m^6 • 36) = (3mn^2)/4; 4) (6x^10)/y^8 : (30x5y2) = (6x^10 • 1)/(y^8 • 30x^5 y^2 ) = x^5/(5y^10 ); 5) 49m4 : 21m/n^2 = (49m^4• n^2)/(1 • 21m) = (7m^3 n^2)/3; 6) (16x^3 y^8)/(33z^5 ) : (–(10x^2)/(55z^6 )) = –(16x^3 y^8 • 55z^6)/(33z^5 • 10x^2 ) = –(8xy^8 z)/3.