Question

(3 1/4+ 2 1/2+5/8)*6​

Answer 1

Ответ:

Пошаговое объяснение:

(3 1/4+ 2 1/2+5/8)*6​ = (13/4 + 5/2 +5/8) * 6= (26/8 + 20/8 +5/8) * 6= 51/8 *6=

= 306/8= 38 1/4

Answer 2

Пошаговое объяснение:

$1)3 \frac{1}{4} + 2 \frac{1}{2} = 5 + \frac{1}{4} + \frac{1}{2} = 5 + - \frac{1 \times 1}{4 \times 1} + \frac{1 \times 2}{2 \times 2} = 5 + \frac{1}{4} + \frac{2}{4} = 5 + \frac{1 + 2}{4} = 5 + \frac{3}{4} = 5 \frac{3}{4}$

$2) 5\frac{3}{4} + \frac{5}{8} = 5 + \frac{3}{4} + \frac{5}{8} = 5 + \frac{3 \times 2}{4 \times 2} + \frac{5 \times 1}{8 \times 1} = 5 + \frac{6}{8} + \frac{5}{8} = 5 + \frac{6 + 5}{8} = 5 + \frac{11}{8} = 5 + \frac{1 \times 8 + 3}{8} = 6 \frac{3}{8}$

$3)6 \frac{3}{8} \times 6 = \frac{3 + 6 \times 8}{8} \times 6 = \frac{51}{8} \times 6 = \frac{51 \times 6}{8} = \frac{306}{8} = \frac{153 \times 2}{4 \times 2} = \frac{153}{4} = \frac{38 \times 4 + 1}{4} = 38 \frac{1}{4}$