– 5/7-(-5/67)+13\30+1/2+(-1 5/6)+1 3/14-(-2/5) 30/08/2021 Bởi Mary – 5/7-(-5/67)+13\30+1/2+(-1 5/6)+1 3/14-(-2/5)
$\frac{-5}{7}$-($\frac{-5}{67}$)+$\frac{13}{30}$+$\frac{1}{2}$+(-1$\frac{5}{6}$)+1$\frac{3}{14}$-($\frac{-2}{5}$)=$\frac{-5}{7}$+$\frac{5}{67}$+$\frac{13}{30}$+$\frac{1}{2}$-$\frac{11}{6}$+$\frac{17}{14}$+ $\frac{2}{5}$=($\frac{-5}{7}$+$\frac{1}{2}$+$\frac{17}{14}$)+($\frac{13}{30}$-$\frac{11}{6}$+$\frac{2}{5}$)+$\frac{5}{67}$=($\frac{-10}{14}$+$\frac{7}{14}$+$\frac{17}{14}$)+($\frac{13}{30}$-$\frac{55}{30}$+$\frac{12}{30}$)+$\frac{5}{67}$=1+(-1)+$\frac{5}{67}$=0+$\frac{5}{67}$=$\frac{5}{67}$ xin hay nhất ạ Bình luận
Đáp án: ` -5/7 – (-5/67) + 13/30 + 1/2 + (-1 5/6) + 1 3/14 – (-2/5)` ` = -5/7 + 5/67 + 13/30 + 1/2 – 11/6 + 17/14 + 2/5` ` = (- 5/7 + 17/14 + 13/30 + 2/5 – 11/6 +1/2) + 5/67` ` = ( -5/7 + 17/14 +1/2) + (13/30 +2/5 -11/6) + 5/67` ` = 1 + (-1) + 5/67` ` = 5/67` Bình luận
$\frac{-5}{7}$-($\frac{-5}{67}$)+$\frac{13}{30}$+$\frac{1}{2}$+(-1$\frac{5}{6}$)+1$\frac{3}{14}$-($\frac{-2}{5}$)
=$\frac{-5}{7}$+$\frac{5}{67}$+$\frac{13}{30}$+$\frac{1}{2}$-$\frac{11}{6}$+$\frac{17}{14}$+ $\frac{2}{5}$
=($\frac{-5}{7}$+$\frac{1}{2}$+$\frac{17}{14}$)+($\frac{13}{30}$-$\frac{11}{6}$+$\frac{2}{5}$)+$\frac{5}{67}$
=($\frac{-10}{14}$+$\frac{7}{14}$+$\frac{17}{14}$)+($\frac{13}{30}$-$\frac{55}{30}$+$\frac{12}{30}$)+$\frac{5}{67}$
=1+(-1)+$\frac{5}{67}$
=0+$\frac{5}{67}$
=$\frac{5}{67}$
xin hay nhất ạ
Đáp án:
` -5/7 – (-5/67) + 13/30 + 1/2 + (-1 5/6) + 1 3/14 – (-2/5)`
` = -5/7 + 5/67 + 13/30 + 1/2 – 11/6 + 17/14 + 2/5`
` = (- 5/7 + 17/14 + 13/30 + 2/5 – 11/6 +1/2) + 5/67`
` = ( -5/7 + 17/14 +1/2) + (13/30 +2/5 -11/6) + 5/67`
` = 1 + (-1) + 5/67`
` = 5/67`