Question

Вычислите а) -4 5/6 + 3/4; б) 4 2/3 - 5 4/9; в) 3/4 - 0,25; г) -5/14 - ( 9/14); д) -5 1/2 - (- 2 3/5); е) -2/3 - (-0,2);

Answer 1

Пошаговое объяснение:

a) $-4 \frac{5}{6}+\frac{3}{4}=-\frac{29}{6}+\frac{3}{4}=-\frac{58}{12}+\frac{9}{12}=-\frac{49}{12} =- 4 \frac{1}{12}$

б)$4 \frac{2}{3}-5 \frac{4}{9}=\frac{14}{3}-\frac{49}{9}=\frac{42}{9}-\frac{49}{9}=-\frac{7}{9}$

в) $\frac{3}{4}-0.25=0.75-0.25=0.5$

г) $-\frac{5}{14}-(\frac{9}{14}) = -\frac{14}{14} =-1$

д) $-5 \frac{1}{2}- (-2 \frac{3}{5})=-5,5-(-2,6)=-5,5+2,6=-2,9$

е) $-\frac{2}{3}-(-0,2)=-\frac{2}{3}-(-\frac{2}{10})=-\frac{2}{3}-(-\frac{1}{5})=-\frac{2}{3}+\frac{1}{5}= -\frac{10}{15}+\frac{3}{15}=-\frac{7}{15}$

Answer 2

a) -4 5/6 лэ+ 3/4= -4 1/12

б) 4 2/3 - 5 4/9= - 7/9

в) 3/4 - 0,25=0,5

г)-5/14 -(9/14)=-1

д)-5 1/2 -(-2 3/5)=2,9

е)-2/3-(-0,2)=-7/15