Question

Найдите сумму:
1)-6+(-10)
2)-0,84+(-0,28)
3)0,68+(-1,6)
4)-5 7/9+(-2 4/9)
5)- 2/9 + (- 1/12)
6)-8 2/15+(-7 1/18)

Answer 1

$1) -6+(-10)=-(6+10)=-16$

$2)-0,84+(-0,28)=-(0,84+0,28)=-1,12$

$3)0,68+(-1,6)=0,68-1,6=-0,92$

$4)-5ttdisplaystylefrac{7}{9}+(-2frac{4}{9})=-(5frac{7}{9}+2frac{4}{9})=-7frac{11}{9}=-8frac{2}{9}$

$5)-ttdisplaystylefrac{2}{9}+(-frac{1}{12})=-(frac{2*4}{9*4}+frac{1*3}{12*3})=-(frac{8}{36}+frac{3}{36})=-frac{11}{36}$

$6)-8ttdisplaystylefrac{2}{15}+(-7frac{1}{18})=-(8frac{2*6}{15*6}+7frac{1*5}{18*5})=-(8frac{12}{90}+7frac{5}{90})=-15frac{17}{90}$