Question

641.3/5•4/9+1 1/3;
3/8:1/2+3 1/4
1 2/5:5/7+3/8;

Answer 1

Ответ:

Пошаговое объяснение:

3/5•4/9+1 1/3 = 12/45 + 1 1/3 = 4/15 + 1 5/15 = 1 9/15 = 1 3/5 = 1.6.

(3/8):(1/2)+3 1/4 = 3/8 * 2/1 + 3 1/4 = 3/4 +3 1/4 = 3 4/4 = 4.

(1 2/5):(5/7)+3/8 =7/5 * 7/5 + 3/8 = 49/25 +3/8 => НОК(25;8) =200 =>

(49*8)/(25*8)  + (3*25)/(8*25) = 392/200 + 75/200 = (392+75)/200 =

= 467/200 = 2 67/200.