(1,375 – 8/9) :4/3 + (1,6 – 5/6 ) :3/5
10/9 – ( 1,75 – 7/8 ) . 4/3
4/3 – 9/8 . 6/5 + ( 7/6 – 3/4 ) :3/2
(4/5 + x ) : 3/4 – 7/8 = 0,75
xin lỗi vì mik còn có 10 điểm
giúp em gấp với ak(❁´◡`❁)( •̀ ω •́ )y(^///^)♪(´▽｀)(～￣(OO)￣)ブ
(1,375 – 8/9) :4/3 + (1,6 – 5/6 ) :3/5
10/9 – ( 1,75 – 7/8 ) . 4/3
4/3 – 9/8 . 6/5 + ( 7/6 – 3/4 ) :3/2
(4/5 + x ) : 3/4 – 7/8 = 0,75
xin lỗi vì mik còn có 10 điểm
giúp em gấp với ak(❁´◡`❁)( •̀ ω •́ )y(^///^)♪(´▽｀)(～￣(OO)￣)ブ
+, (1, 375 – $\frac{8}{9}$) : $\frac{4}{3}$ + (1,6 – $\frac{5}{6}$) : $\frac{3}{5}$
= ($\frac{11}{8}$ – $\frac{8}{9}$) : $\frac{4}{3}$ + ($\frac{8}{5}$ – $\frac{5}{6}$) : $\frac{3}{5}$
= ($\frac{99}{72}$ – $\frac{64}{72}$) : $\frac{4}{3}$ + ($\frac{48}{30}$ – $\frac{25}{30}$) : $\frac{3}{5}$
= $\frac{35}{72}$ x $\frac{3}{4}$ + $\frac{23}{30}$ x $\frac{5}{3}$
= $\frac{35}{96}$ + $\frac{23}{18}$
= $\frac{105}{288}$ + $\frac{368}{288}$
= $\frac{473}{288}$
+, $\frac{10}{9}$ – (1,75 – $\frac{7}{8}$) . $\frac{4}{3}$
= $\frac{10}{9}$ – ($\frac{7}{4}$ – $\frac{7}{8}$) . $\frac{4}{3}$
= $\frac{10}{9}$ – ($\frac{14}{8}$ – $\frac{7}{8}$) . $\frac{4}{3}$
= $\frac{10}{9}$ – $\frac{7}{8}$ . $\frac{4}{3}$
= $\frac{10}{9}$ – $\frac{7}{6}$
= $\frac{20}{18}$ – $\frac{21}{18}$
= -$\frac{1}{18}$
+, $\frac{4}{3}$ – $\frac{9}{8}$ . $\frac{6}{5}$ + ($\frac{7}{6}$ – $\frac{3}{4}$) : $\frac{3}{2}$
= $\frac{4}{3}$ – $\frac{27}{20}$ + ($\frac{14}{12}$ – $\frac{9}{12}$) : $\frac{3}{2}$
= $\frac{4}{3}$ – $\frac{27}{20}$ + $\frac{5}{12}$ x $\frac{2}{3}$
= $\frac{4}{3}$ – $\frac{27}{20}$ + $\frac{5}{18}$
= $\frac{240}{180}$ – $\frac{243}{180}$ + $\frac{50}{180}$
= $\frac{47}{180}$
+, ($\frac{4}{5}$ + x) : $\frac{3}{4}$ – $\frac{7}{8}$ = 0,75
⇔ ($\frac{4}{5}$ + x) : $\frac{3}{4}$ = $\frac{13}{8}$
⇔ $\frac{4}{5}$ + x = $\frac{39}{32}$
⇔ x = $\frac{67}{160}$