Question

выполните действия : 1) 5/9+1/9; 2) 8/17-2/17; 3) 8/25-3/25+9/25; 4) 21/57+31/57-9/57

Answer 1

5/9+1/9=6/9
8/17-2/17=6/17
8/25-3/25+9/25=5/25+9/25=14/25
21/57+31/57-9/57=52/57-9/57=43/57