СРОЧНО!!!!ДАЮ 20 БАЛЛОВ!!. Created by TogaHimiko. matematika-ru

СРОЧНО!!!!ДАЮ 20 БАЛЛОВ!!...

HasAnn

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Ответ:

1) -9-13= -22

2) -3,6 - 1,5= - 5,1

3) -5/16 -7/16= - 12/16=-3/4

4) -3/7 - 4/9= - 27/63 - 28/63= -55/63

Пошаговое объяснение:

1 votes Thanks 2

Avantgardе

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$1) \; -9 + (-13) = -9 - 13 = -22 \\\\ 2) \; -3,6 + (-1,5) = -3,6 - 1,5 = -5,1 \\\\ 3) \; -\frac{5}{16} + (-\frac{7}{16}) = -\frac{5}{16} - \frac{7}{16} = -\frac{12}{16} = -\frac{3}{4} \\\\ 4) \; -\frac{3}{7} + (-\frac{4}{9}) = -\frac{3}{7} - \frac{4}{9} = -\frac{27}{63} - \frac{28}{63} = -\frac{55}{63}$

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