Вычислите 5/7×21/25+3/5:9/11

[latex] \frac{5}{7} [/latex] · [latex] \frac{21}{25} [/latex] + [latex] \frac{3}{5} [/latex] · [latex] \frac{11}{9} [/latex] = [latex] \frac{3}{5} [/latex] + [latex] \frac{11}{15} [/latex] = [latex] \frac{9}{15} [/latex] + [latex] \frac{11}{15} [/latex] = [latex] \frac{20}{15} [/latex] = [latex] \frac{4}{3} [/latex] = 1[latex] \frac{1}{3} [/latex]