Помогите решить. - 1/3+1/2 4/7+3/14 -2 5/6+(-31/3) 7 1/5+(-4 4/15) 2 1/6+(-3/8) -1/12+7/60 -10/9+1 8/9. Created by svetlanaGB. matematika-ru

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mirzeynal9 $1)~\displaystyle\tt-\frac{1}{3} +\frac{1}{2}=\frac{-2+3}{6}=\frac{1}{6};\\\\\\2)~\frac{4}{7} +\frac{3}{14} =\frac{8+3}{14} =\frac{11}{14};\\\\\\3)~-2\frac{5}{6} +\Big(-\frac{31}{3}\Big)=-\frac{17}{6} -\frac{31}{3} =\frac{-17-62}{6}=-\frac{79}{6} =-13\frac{1}{6};\\\\\\4)~7\frac{1}{5} +\Big(-4\frac{4}{15}\Big)=\frac{36}{5} -\frac{64}{15}=\frac{108-64}{15}=\frac{44}{15} =2\frac{14}{15} ;\\\\\\ 5)~2\frac{1}{6}+\Big(-\frac{3}{8}\Big)=\frac{13}{6}-\frac{3}{8} =\frac{52-9}{24} =\frac{43}{24}= 1\frac{19}{24};\\\\\\6)~-\frac{1}{12}+\frac{7}{60}=\frac{-5+7}{60}=\frac{2}{60} =\frac{1}{30} ;\\\\\\7)~-\frac{10}{9}+1\frac{8}{9}=-\frac{10}{9}+\frac{17}{9}=\frac{-10+17}{9}=\frac{7}{9}$

1 votes Thanks 1

Nekit455

Verified answer

-1/3+1/2=1/6

4/7+3/14=11/14

-2 5/6+(-31/3)=-79/6=-13 1/6

7 1/5+(-4 4/15)=2 14/15

2 1/6+(-3/8)=1 19/24

-1/12+7/60=1/30

-10/9+1 8/9=7/9

0 votes Thanks 2

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