4 1/3-2,7 - 17,3
!4 1/3 là hỗn số!
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Những câu hỏi liên quan
T
6 tháng 8 2018
a/\(2\frac{1}{3}=\frac{2.3+1}{3}=\frac{7}{3}\)
\(4\frac{2}{5}=\frac{4.5+2}{5}=\frac{22}{5}\)
\(3\frac{1}{4}=\frac{3.4+1}{4}=\frac{13}{4}\)
\(9\frac{5}{7}=\frac{9.7+5}{7}=\frac{68}{7}\)
\(11\frac{3}{10}=\frac{11.10+3}{10}=\frac{113}{10}\)
b/\(5\frac{2}{17}=\frac{5.17+2}{17}=\frac{87}{17}\)
\(3\frac{6}{23}=\frac{3.23+6}{23}=\frac{75}{23}\)
\(7\frac{4}{9}=\frac{7.9+4}{9}=\frac{67}{9}\)
\(121\frac{15}{100}=\frac{121.100+15}{100}=\frac{12115}{100}\)
\(8\frac{3}{7}=\frac{8.7+3}{7}=\frac{59}{7}\)
QA
2
S
28 tháng 6 2015
a/ x/-27 = -3/x
=> x^2 = -27 . -3
=> x^2 = 81
=> x^2 = 9^2 = (-9)^2
=> x = 9 hoặc x = -9
NQ
2
QD
25 tháng 8 2017
\(3x:2,7=\dfrac{1}{3}:2\dfrac{1}{4}\)
\(3x:\dfrac{27}{10}=\dfrac{4}{27}\)
\(3x=\dfrac{4}{27}.\dfrac{27}{10}\)
\(3x=\dfrac{2}{5}\)
\(x=\dfrac{2}{5}:3\)
x = 2/15
NT
1
29 tháng 6 2015
a) \(\Leftrightarrow x^2=81\Leftrightarrow x=+-9\)
b) \(-x^2=-4\Leftrightarrow x=+-2\)
c) \(\frac{3x}{2,7}=\frac{1}{3}:2\frac{1}{4}\Leftrightarrow\frac{3x}{2,7}=\frac{4}{27}\Leftrightarrow3x=\frac{2}{5}\Leftrightarrow x=\frac{2}{15}\)
2 tháng 12 2017
x + x : 0,2 = 1,35
x * 1 + x * 5 = 1,35
x * ( 1 + 5 ) = 1,35
x * 6 = 1,35
x = 1,35 : 6
x = 0,225
hok tốt nha ^_^
19 tháng 9 2017
\(2\frac{1}{2}=>3\frac{1}{2}=>3\frac{5}{6}=>7\frac{3}{4}=>7\frac{5}{6}\)
\(=>9\frac{1}{15}\)
17 tháng 9 2020
\(\left|\frac{5}{-4}\right|-\left|\frac{1}{-3}\right|+-\frac{5}{6}-4\frac{1}{2}\)
\(=\left|-\frac{5}{4}\right|-\left|\frac{-1}{3}\right|+\frac{-5}{6}-\frac{9}{2}\)
\(=\frac{5}{4}-\frac{1}{3}+\frac{-5}{6}-\frac{9}{2}=-\frac{53}{12}\)
\(\frac{5}{8}-\left|-\frac{1}{12}\right|-3\frac{1}{4}+\left|-\frac{5}{6}\right|\)
\(=\frac{5}{8}-\frac{1}{12}-\frac{13}{4}+\frac{5}{6}=-\frac{15}{8}\)
\(\frac{3}{-7}+\left|-\frac{5}{12}\right|+3\frac{1}{4}+\left|-\frac{5}{6}\right|\)
\(=\frac{-3}{7}+\frac{5}{12}+\frac{13}{4}+\frac{5}{6}=\frac{57}{14}\)
\(1\frac{3}{5}-\left|\frac{1}{-4}\right|+\frac{2}{-3}-\left|-\frac{1}{2}\right|\)
\(=\frac{8}{5}-\left|\frac{-1}{4}\right|+\frac{-2}{3}-\frac{1}{2}\)
\(=\frac{8}{5}-\frac{1}{4}+\frac{-2}{3}-\frac{1}{2}\)
\(=\frac{27}{20}+\frac{-7}{6}=\frac{27}{20}-\frac{7}{6}=\frac{11}{60}\)
6 tháng 8 2022
a: \(\Leftrightarrow\left(\dfrac{13}{4}:x\right)\cdot\left(-\dfrac{5}{4}\right)=\dfrac{-10}{6}-\dfrac{5}{6}=\dfrac{-15}{6}=\dfrac{-5}{2}\)
\(\Leftrightarrow\dfrac{13}{4}:x=\dfrac{5}{2}\cdot\dfrac{5}{4}=\dfrac{25}{8}\)
hay \(x=\dfrac{13}{4}:\dfrac{25}{8}=\dfrac{13}{4}\cdot\dfrac{8}{25}=\dfrac{26}{25}\)
b: \(\Leftrightarrow\dfrac{3}{4}:x=\dfrac{11}{36}-\dfrac{1}{4}=\dfrac{2}{36}=\dfrac{1}{18}\)
=>\(x=\dfrac{3}{4}:\dfrac{1}{18}=\dfrac{54}{4}=\dfrac{27}{2}\)
c: \(\Leftrightarrow\left(-\dfrac{6}{5}+x\right):\left(-3.6\right)=-\dfrac{7}{4}+\dfrac{1}{4}\cdot8=\dfrac{1}{4}\)
=>x-6/5=-9/10
=>x=3/10
NH
9 tháng 3 2023
\(2,25-1\dfrac{3}{4}\\ =2,25-\dfrac{7}{4}\\ =\dfrac{9}{4}-\dfrac{7}{4}\\ =\dfrac{5}{4}\)
4\(\dfrac{1}{3}\) - 2,7 - 17,3
= \(\dfrac{13}{3}\) - ( 2,7 + 17,3)
= \(\dfrac{13}{3}\) - 20
= \(\dfrac{13}{3}\) - \(\dfrac{60}{3}\)
= - \(\dfrac{47}{3}\)