Question

Выполните умножения 9/2а×5а/3= 3)b^2/10×5/b 5)5/3a×2b/3= 7)3b^2/10×15/b^3= 9)5a/8y×7/10= 11)18/c^4×c^3/24= 13)15x^3/4×12/5x=

Answer 1

$1) frac{9}{2a} * frac{5a}{3} = frac{9*5a}{3*2a} = frac{3*5*1}{1*2*1} = frac{15}{2} =7.5 \ \ 3) frac{b^2}{10} * frac{5}{b} = frac{5*b^2}{10*b} = frac{1*b}{2*1} = frac{b}{2}= frac{1}{2} *b=0.5b \ \ 5) frac{5}{3a} * frac{2b}{3} = frac{10b}{9a} \ \ 7) frac{3b^2}{10} * frac{15}{b^3} = frac{3b^2*15}{10*b^3} = frac{3*3}{2*b} =frac{9}{2b} \ \ 9) frac{5a}{8y} * frac{7}{10} = frac{5a*7}{8y*10}= frac{1*a*7}{8y*2} = frac{7a}{16y}$

$11) frac{18}{c^4} * frac{c^3}{24} = frac{18c^3}{24c^4} = frac{3*1}{4*c} = frac{3}{4c} \ \ 13) frac{15x^3}{4} * frac{12}{5x} = frac{15x^3*12}{4*5x} = frac{3*x^2*3}{1*1} = frac{9x^2}{1} = 9x^2$