• А) -1 3/7-(+2 3/7)= -1 3/7-(-2 3/7)= 1 3/7-(-2 3/7)= 1 3/7-(+2 3/7)= 1 3/7+(-2 3/7)= -1 3/7+(-2 3/7)=

Ответы 1

  •  -1 3/7 - (+2 3/7) = -1 3/7 - 2 3/7 = -10/7 - 17/7 = -27/7 = - 3 6/7;

    -1 3/7 - (-2 3/7) = -1 3/7 + 2 3/7 = -10/7 + 17/7 = 7/7 = 1;

    1 3/7 - (-2 3/7) = 1 3/7 + 2 3/7 = 10/7 + 17/7 = 27/7 = 3 6/7;

    1 3/7 - (+2 3/7) = 1 3/7 - 2 3/7 = 10/7 - 17/7 = -7/7 = -1;

    1 3/7 + (-2 3/7) = 1 3/7 - 2 3/7 = 10/7 - 17/7 = -7/7 = -1;

    -1 3/7 + (-2 3/7) = -1 3/7 - 2 3/7 = -10/7 - 17/7 = -27/7 = - 3 6/7;

     

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