Hãy nhập câu hỏi của bạn vào đây, nếu là tài khoản VIP, bạn sẽ được ưu tiên trả lời.
\(\frac{x}{468}=-\frac{7}{13}\times\frac{5}{9}\)
\(\Leftrightarrow\frac{x}{468}=-\frac{35}{117}\)
\(\Leftrightarrow x.117=-35\times468\)
\(\Leftrightarrow x.117=-14976\)
\(\Leftrightarrow x=-128\)
Vậy \(x=-128\)
x/468=-7/13x 5/9
x/468=-35/117
=>x.117=-35.468
=>x.117=-16380
x=-16380:117
x=-140
Vậy x= -140.
a )
\(\frac{-1}{5}.\frac{1}{2}=\frac{\left(-1.1\right)}{5.2}=\frac{-1}{10}\)
b )
\(\frac{-1}{8}.\frac{8}{9}=\frac{-1.1}{1.9}=\frac{-1}{9}\)
c )
\(\frac{-3}{7}.\frac{14}{15}=\frac{-1.2}{1.3}=\frac{-2}{3}\)
e )
\(\left(-4\right).\frac{7}{24}=\frac{-28}{24}=\frac{-7}{6}\)
f )
\(\frac{-9}{13}.\frac{-5}{18}=\frac{\left(-1\right).\left(-5\right)}{13.2}=\frac{6}{26}=\frac{3}{13}\)
đúng đó , tk mk nhé ! hihiii
a,\(\frac{-1}{10}\) b,\(\frac{-1}{9}\) c,\(\frac{-2}{5}\) e,\(\frac{-7}{6}\) f,\(\frac{-5}{26}\)
\(A=\frac{2}{13}.\frac{5}{9}+\frac{2}{13}.\frac{4}{9}+\frac{11}{13}=\frac{2}{13}.\left(\frac{5}{9}+\frac{4}{9}\right)+\frac{11}{3}\)
\(=\frac{2}{13}.1+\frac{11}{13}\)
\(=\frac{2}{13}+\frac{11}{13}=1\)
\(A=\frac{2}{13}\cdot\frac{5}{9}+\frac{2}{13}\cdot\frac{4}{9}+\frac{11}{13}\)
\(A=\frac{2}{13}\left(\frac{5}{9}+\frac{4}{9}\right)+\frac{11}{13}\)
\(A=\frac{2}{13}\cdot1+\frac{11}{13}\)
\(A=\frac{2}{13}+\frac{11}{13}\)
\(A=\frac{13}{13}=1\)
\(a.-\dfrac{1}{5}.\dfrac{1}{2}\)
\(=\dfrac{-1.1}{5.2}\)
\(=\dfrac{-1}{10}.\)
\(b.-\dfrac{1}{8}.\dfrac{8}{9}\)
\(=\dfrac{-1.8}{8.9}\)
\(=\dfrac{-1}{9}.\)
\(c.-\dfrac{3}{7}.\dfrac{14}{15}\)
\(=\dfrac{-3.14}{7.15}\)
\(=\dfrac{-3.7.2}{7.3.5}\)
\(=\dfrac{-2}{5}.\)
\(d.-\dfrac{7}{5}.\dfrac{15}{21}\)
\(=\dfrac{-7.15}{5.21}\)
\(=\dfrac{-7.5.3}{5.7.3}\)
\(=-1.\)
\(e.-4.\dfrac{7}{24}\)
\(=\dfrac{-4.7}{24}\)
\(=\dfrac{-4.7}{4.6}\)
\(=\dfrac{-7}{6}.\)
\(f.-\dfrac{9}{13}.\dfrac{5}{18}\)
\(=\dfrac{-9.5}{13.18}\)
\(=\dfrac{-9.5}{13.9.2}\)
\(=\dfrac{-1.5}{13.2}\)
\(=\dfrac{-5}{26}.\)
\(=\dfrac{7}{19}\cdot\dfrac{5}{13}+\dfrac{7}{19}\cdot\dfrac{8}{13}-3\cdot\dfrac{7}{19}=\dfrac{7}{19}\cdot\left(\dfrac{5}{13}+\dfrac{8}{13}-3\right)=-2\cdot\dfrac{7}{19}=-\dfrac{14}{19}\)
A so 9
Vi mk cong tong cac STN lai=18
Hieu cac so lien tiep la2
18:2=9
Mình thay * bằng số 0 và số 9
4680 : 3 = 1560
4680 : 9 = 520
4689 : 3 = 1563
4689 : 9 = 521
123456789
x/468 = -7/13.5/9
x/468 = -35/117
x/468 = -140 / 468
Hok tốt nhé#