A)2 1/3 - 1 1/2 в)7 1/9 - 4 1/3 д)6 1/4 - 3 2/5 - вопрос №5232188213112719413614325 от mc9584 26.12.2020 20:09

Question

Математика: A)2 1/3 - 1 1/2 в)7 1/9 - 4 1/3 д)6 1/4 - 3 2/5

mc9584 · Answer

2 1/3 - 1 1/2 = 7/3 - 3/2 =(7 * 2 - 3 * 3)/6 = 14/6 - 9/6 = 5/6
7 1/9 - 4 1/3 = 64/9 - 13/3 =(64*1 - 13 * 3)/9 = 64/9 - 39/9 = 25/9 = 2 7/9
6 1/4 -3 2/5 = 25/4-17/5 =(25* 5-17 * 4)/20 = 125/20- 68/20 =57/20 = 2 17/20