\(\dfrac{14}{27}\)...\(\dfrac{15}{26}\)
điền dấu nha
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H24
25 tháng 3 2022 lúc 16:41
điền dấu:\(\dfrac{2010}{2011}\) ......... \(\dfrac{26}{25}\)
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Điền dấu thích hợp (>,<,=) vào chỗ trống.
a,\(\dfrac{-3}{5}+\dfrac{-11}{5}...\dfrac{-7}{3}+\dfrac{4}{7}\)
b,\(\dfrac{-7}{11}+\dfrac{-15}{11}...\dfrac{-4}{3}+\dfrac{-7}{5}\)
Giúp mk nha :>>. Mk cảm ơn.
c thành phân số : ko cần rút gọn nha
\(14\dfrac{15}{26}\)
\(14\dfrac{15}{26}=\dfrac{14x26+15}{26}=\dfrac{379}{26}\)
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\(B=\left|157\dfrac{13}{27}-273\dfrac{7}{19}\right|-96\dfrac{14}{27}+15\dfrac{12}{19}\)\(B=\left|157\dfrac{13}{27}-273\dfrac{7}{19}\right|-96\dfrac{14}{27}+15\dfrac{12}{19}\)
\(B=\left|157\dfrac{13}{27}-273\dfrac{7}{19}\right|-96\dfrac{14}{27}+15\dfrac{12}{19}\)
\(=273\dfrac{7}{19}-153\dfrac{13}{27}-96\dfrac{14}{27}+15\dfrac{12}{19}\)
\(=\left(273+15+\dfrac{7}{19}+\dfrac{12}{19}\right)-\left(153+96+\dfrac{13}{27}+\dfrac{14}{27}\right)\)
\(=289-250=39\)
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6. Điền dấu >; <; = vào chỗ chấm:
\(\dfrac{5}{15}\) ...............\(\dfrac{12}{8}\)
\(\dfrac{5}{15}\) ............... \(\dfrac{3}{9}\)
\(\dfrac{5}{15}\) ................ \(\dfrac{5}{8}\)
Giúp mình nhanh với ạ, làm đúng mình tick cho ạ
5/15 < 12/8
5/15 = 3/9
5/15 > 5/8
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\(\dfrac{2014}{2015}\)...\(\dfrac{1999}{2000}\)
điền dấu tiếp nha mng
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Tính nhanh:
13) \(\dfrac{45}{8}\left(\dfrac{4}{15}-\dfrac{7}{8}\right)+\dfrac{45}{8}\left(\dfrac{11}{15}+\dfrac{9}{8}\right)\)
14) \(\dfrac{15}{7}\left(\dfrac{49}{35}-\dfrac{27}{8}\right)-\left(\dfrac{2}{5}-\dfrac{27}{4}\right):\dfrac{7}{15}\)
13)\(\dfrac{45}{8}\left(\dfrac{4}{15}-\dfrac{7}{8}\right)+\dfrac{45}{8}\left(\dfrac{11}{15}+\dfrac{9}{8}\right)\)
=\(\dfrac{45}{8}\left(\dfrac{4}{15}-\dfrac{7}{8}+\dfrac{11}{15}+\dfrac{9}{8}\right)\)
=\(\dfrac{45}{8}\left[\left(\dfrac{4}{15}+\dfrac{11}{15}\right)-\left(\dfrac{7}{8}-\dfrac{9}{8}\right)\right]\)
=\(\dfrac{45}{8}.\dfrac{5}{4}\)=\(\dfrac{225}{32}\)
14)\(\dfrac{15}{7}\left(\dfrac{49}{35}-\dfrac{27}{8}\right)-\left(\dfrac{2}{5}-\dfrac{27}{4}\right):\dfrac{7}{15}\)
=\(\dfrac{15}{7}\left(\dfrac{49}{35}-\dfrac{27}{8}\right)-\left(\dfrac{2}{5}-\dfrac{27}{4}\right).\dfrac{15}{7}\)
=\(\dfrac{15}{7}\left[\left(\dfrac{49}{35}-\dfrac{27}{8}\right)-\left(\dfrac{2}{5}-\dfrac{27}{4}\right)\right]\)
=\(\dfrac{15}{7}\left(\dfrac{49}{35}-\dfrac{27}{8}-\dfrac{2}{5}+\dfrac{27}{4}\right)\)
=\(\dfrac{15}{7}.\dfrac{35}{8}\)=\(\dfrac{75}{8}\)
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Điền dấu ,, vào chỗ chấm:dfrac{3}{4}.....dfrac{12}{16} dfrac{5}{6}........dfrac{7}{9} dfrac{4}{15}........dfrac{4}{13} dfrac{5}{4}-dfrac{5}{6}.......dfrac{3}{4}-dfrac{2}{3}
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Điền dấu >,<,= vào chỗ chấm:
\(\dfrac{3}{4}\).....\(\dfrac{12}{16}\) \(\dfrac{5}{6}\)........\(\dfrac{7}{9}\) \(\dfrac{4}{15}\)........\(\dfrac{4}{13}\) \(\dfrac{5}{4}\)-\(\dfrac{5}{6}\).......\(\dfrac{3}{4}\)-\(\dfrac{2}{3}\)
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Điền dấu >,<, = thích hợp vào ô trống
\(\dfrac{15}{100}\) .................. 115 %
\(\dfrac{5}{2}\) ................ 2.5
\(\dfrac{15}{100}=0,15\)
\(115\%=\dfrac{115}{100}=1,15\)
Mà \(0,15< 1,15\)
Vậy \(\dfrac{15}{100}< 115\%\)
____________
\(\dfrac{5}{2}=2,5\)
Vậy \(\dfrac{5}{2}=2,5\)
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\(\dfrac{15}{100} = 115% \)%
\(\dfrac{5}{2}=2,5\)
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