Question

решение примеров на все действия с обыкновенными дробями (13 1/7-5 2/3):5/7

Answer 1

(13 1/7-5 2/3):5/7=(13*5+1/5-15+2/3):5/7=(66/5-17/3):5/7=66*3-5*17;5*3:5/7=198-85/15:5/7=113/15:5/7=113*7/15*5=791/75=10 41/75

Answer 2

спасибо

Answer 3

(13 1/7 - 5 2/3) : 5/7 = 9 1/15
1) 13 1/7 - 5 2/3 = 8 + (1/7 - 2/3) = 7 + (3-14)/21 = 7 - 11/21 = 6 10/21
2) 6 10/21 : 5/7 = 136/21 : 5/7 = 136/21 * 7/5 = 136/15 = 9 1/15