Question

1.Найти значение выражения:(5 1/2+7 1/3)*6 3/4

Answer 1

(5½+7⅓)×6¾ = (11/2+22/3)×27/4 = 1
77/6 × 27/4 = 86⅝

Answer 2

$(5 \frac{1}{2} +7 \frac{1}{3} ) * 6 \frac{3}{4} = 86 \frac{5}{8} \\ \\ 1) 5 \frac{1}{2} +7 \frac{1}{3} = 5 \frac{3}{6} + 7 \frac{2}{6} = (5+7) + \frac{3+2}{6} = 12 \frac{5}{6} \\ \\ 2) 12 \frac{5}{6} * 6 \frac{3}{4} = \frac{12*6+5}{6}* \frac{6*4+3}{4} = \frac{77*27}{6*4} = \frac{77*9}{2*4} = \frac{693}{8} = 86 \frac{5}{8}$