Вычислите 25/49*21/50 45/64:81/96 121/140*350/363

[latex]1) frac{25*21}{49*50}= frac{1*3}{7*2} = frac{3}{14} [/latex][latex] 2)frac{45}{64}: frac{81}{96} = frac{45*96}{64*81} = frac{5*3}{2*9}= frac{5}{2*3} = frac{5}{6} [/latex][latex]3) frac{121*350}{140*363}= frac{1*5}{2*3}= frac{5}{6} [/latex]