Question

люди хелп ми плиз помогите (-5)-(+1/7) еще (-4/5)+(+2/5) и (-2)-(-6 2/3) и (-7/16)+(-6/16)

Answer 1

Вычислить.

$big(-5big) - left(+dfrac{1}{7}right) = -5 - dfrac{1}{7} = -left(5 + dfrac{1}{7}right) = -5dfrac{1}{7};\\left(-dfrac{4}{5}right) + left(+dfrac{2}{5}right) = -dfrac{4}{5} + dfrac{2}{5} = dfrac{-4 + 2}{5} = dfrac{-2}{5} = -dfrac{2}{5};\\big(-2big) - left(-6dfrac{2}{3}right) = -2 + 6dfrac{2}{3} = 6dfrac{2}{3} - 2 = 4dfrac{2}{3};\\left(-dfrac{7}{16}right) + left(-dfrac{6}{16}right) = -dfrac{7}{16} -dfrac{6}{16} = -left(dfrac{7 + 6}{16}right) = -dfrac{13}{16}.$