(6 * (-2)) * 5= 5 * (4 * (-7)=
8 *(-5) * (-3) =
(6 * (-3)) * (-2)=
2 * ((-1.5) * 9)=
(7* (-0.4))*(-5)=
5 * (-0.6) * (-3)) =
268
477
Ответы на вопрос:
8/15r+1/5r-1/3r= 8/15r+3/15r-5/15r= 6/15r r=3,5 (6/15) x 3,5 =21/15= 7/5 или = 1,4
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