Question

Care sunt inversele numerelor:
2/7, -13/1, 4 intregi si 2/9, -5 intregi si 3/7 ,-3(3) , -0,2(5)

Answer 1

2/7  invers   7/2
4int 2/9=38/9      inv. 9/38
-5int.3/7-38/7       inv.-7/38
-3(3)      -1/3(3)
-0,2(5)     -1/0,2(5)