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\(\frac{5}{9}\times\frac{8}{17}+\frac{4}{9}\times\frac{8}{17}\)
\(=\left(\frac{5}{9}+\frac{4}{9}\right)\times\frac{8}{17}\)
\(=1\times\frac{8}{17}\)
\(=\frac{8}{17}\)
\(\frac{5}{5}x\)\(\frac{17}{21}+\frac{17}{21}x\)\(\frac{2}{5}\)
=(\(\frac{5}{5}+\frac{2}{5}\)) x\(\frac{17}{21}\)
=\(\frac{7}{5}x\)\(\frac{17}{21}\)
\(\frac{119}{105}\)
12/15 + 37/7 + 16/5 + 5/7
= 4/5 + 37/7 + 16/5 + 5/7
= (4/5 + 16/5) + (37/7 + 5/7)
= 4 + 6
= 10
Chúc bạn học tốt.
😁😁😁
\(\frac{15}{34}-\frac{5}{17}+\frac{19}{34}-\frac{12}{17}\)
\(=\left(\frac{15}{34}+\frac{19}{34}\right)-\left(\frac{5}{17}+\frac{12}{17}\right)\)
\(=1-1=0\)
\(\frac{15}{34}-\frac{5}{17}+\frac{19}{34}-\frac{12}{17}\)
\(=\left(\frac{15}{34}+\frac{19}{34}\right)-\left(\frac{5}{17}+\frac{12}{17}\right)\)
\(=\frac{34}{34}-\frac{17}{17}\)
\(=1-1\)
\(=0\)
a,Ta có: \(1-\frac{17}{19}=\frac{2}{19}\) và \(1-\frac{15}{17}=\frac{2}{17}\)
Vì \(\frac{2}{19}< \frac{2}{17}\) nên \(\frac{17}{19}< \frac{15}{17}\)
1a) \(\frac{12}{17}+\frac{19}{17}+\frac{8}{17}\)
\(=\left(\frac{12}{17}+\frac{8}{17}\right)+\frac{19}{17}\)
\(=\frac{20}{17}+\frac{19}{17}\)
\(=\frac{39}{17}\)
b) \(\frac{2}{5}+\frac{7}{12}+\frac{13}{12}\)
\(=\frac{2}{5}+\frac{5}{3}\)
\(=\frac{31}{15}\)
2) \(\frac{25}{3}-x=\frac{5}{6}\)
\(x=\frac{25}{3}-\frac{5}{6}\)
\(x=\frac{45}{6}\)
ủng hộ tớ nha
\(=\dfrac{5}{12}+\left(\dfrac{8}{17}+\dfrac{60}{17}\right)\\ =\dfrac{5}{12}+4=4\dfrac{5}{12}\)
a)12/17+19/17+8/17=(12/17+8/17)+19/17=20/17+19/17=39/17
b)2/5+7/12+13/12=2/5+(7/12+13/12)=2/5+5/3=31/15
~HT~
k cho mình nha
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39/17
39/17