Давай решим эти примеры!
1) 20-2 = 1 / 202 = 1 / 400 = 0,0025
2) 0,3-1 = (3/10)-1 = 10/3 = 3 1/3
3) (-6)-3 = 1 / (-6)3 = 1 / (-216) = -1/216
4) (4/7)-2 = (7/4)2 = 49/16 = 3 1/16
1) 3-1 - 4-1 = 1/3 - 1/4 = 4/12 - 3/12 = 1/12
2) (2/7)-1 + (-2,3)0 - 5-2 = 7/2 + 1 - 1/25 = 3,5 + 1 - 0,04 = 4,5 - 0,04 = 4,46