Question

Отметьте «+» верно выполненные выражения
1) 25 – 17 = 8
2) - 7 – 13 = 20
3) 2/7 + 3/7 = (2+3)/7 = 5/7
4) 5/6 - 5/12 = 10/12 - 5/12 = 5/12
5) – 9 • 7 = - 63
6) 8 : (- 4) = 2
7) 4/9 • (-5/7) = (4 •5)/(9 • 7) = 20/63
8) - 3/4 : 4/7 = - 3/4 • 7/4 = - 21/16

Answer 1

1+
2- // -7-13=-20
3+
4+
5+
6- //-2
7- //-20/63
8+