(-2,5 + 2 1/3) * (-5 1/7) + 1 1/3 : (-5,6) = 13/21
1) - 2 1/2 + 2 1/3 = - 2 3/6 + 2 2/6 = - 1/6
2) - 1/6 * (- 5 1/7) = - 1/6 * (- 36/7) = 6/7
3) 1 1/3 : ( - 5 3/5) = 4/3 : (- 28/5) = 4/3 * (- 5/28) = - 5/21
4) 6/7 + (- 5/21) = 18/21 - 5/21 = 13/21
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(-2,5 + 2 1/3) * (-5 1/7) + 1 1/3 : (-5,6) = 13/21
1) - 2 1/2 + 2 1/3 = - 2 3/6 + 2 2/6 = - 1/6
2) - 1/6 * (- 5 1/7) = - 1/6 * (- 36/7) = 6/7
3) 1 1/3 : ( - 5 3/5) = 4/3 : (- 28/5) = 4/3 * (- 5/28) = - 5/21
4) 6/7 + (- 5/21) = 18/21 - 5/21 = 13/21