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\(\dfrac{3}{4}\times\dfrac{8}{5}:1\dfrac{1}{6}\)
=\(\dfrac{6}{5}:\) \(\dfrac{7}{6}\)
=\(\dfrac{6}{5}\times\dfrac{6}{7}=\dfrac{36}{35}\)
2\(\dfrac{1}{3}\) x 1\(\dfrac{1}{4}\) -\(\dfrac{7}{5}\)
\(\dfrac{7}{3}\times\dfrac{5}{4}-\) \(\dfrac{7}{5}\)
\(\dfrac{35}{12}-\dfrac{7}{5}\)
\(\dfrac{175}{60}-\dfrac{84}{60}=\dfrac{91}{60}\)
4\(\dfrac{2}{3}+1\dfrac{1}{4} +2\dfrac{1}{3}+2\dfrac{3}{7}\)
(4 +2) + \(\left(\dfrac{2}{3}+\dfrac{1}{3}\right)\) +1\(\dfrac{1}{4}\) + \(2\dfrac{3}{7}\)
6 + 1 + \(\dfrac{5}{4}\) + \(\dfrac{17}{7}\)
7 + \(\dfrac{103}{28}\)
\(\dfrac{299}{28}\)
Ta có:
7/6 = 6/6 + 1/6 = 1 + 1/6
9/8 = 8/8 + 1/8 = 1 + 1/8
Vì 1/6 > 1/8
=> 1 + 1/6 > 1 + 1/8
=> 7/6 > 9/8
\(\frac{7}{6};\frac{9}{8}\)
\(\frac{28}{24};\frac{27}{24}=\frac{28}{24}>\frac{27}{24}\)
\(\frac{7}{6}>\frac{9}{8}\)
K mình nha 
Công Chúa Họ NGuyễn
\(\left(2020\frac{2018}{2021}-2019\frac{20182018}{20212021}\right):\frac{2018}{2021}\)
\(=\left(2020\frac{2018}{2021}-2019\frac{2018}{2021}\right):\frac{2018}{2021}\)
\(=1:\frac{2018}{2021}=\frac{2021}{2018}\)
1. \(\frac{1}{12};\frac{2}{3};\frac{3}{4};\frac{5}{6}\)
2. S hồ nước là: 1,5ha( 15000\(^{m^2}\)
3. bố 40tuổi; con 10 tuổi
mình biết nhưng mình sẽ ko trả lời vì thế la sai xin lỗi nha
\(\dfrac{2}{3}=\dfrac{8}{12};\dfrac{3}{4}=\dfrac{9}{12};\dfrac{5}{6}=\dfrac{10}{12};\)\(\dfrac{1}{12}\)
1 từ bé đến lớn:
\(\dfrac{1}{12}< \dfrac{8}{12}< \dfrac{9}{12}< \dfrac{10}{12}\)
⇒ \(\dfrac{1}{12}< \dfrac{2}{3}< \dfrac{3}{4}< \dfrac{5}{6}\)
\(\frac{5}{10}.\frac{9}{7}.\frac{7}{6}=\frac{5.9.7}{10.7.6}=\frac{3}{2}\)
k nha mình k lại
Ta có:
`7/10=(7 xx 6)/(10 xx 6)=42/60`
`4/5=(4 xx 12)/(5 xx 12)=48/60`
`9/15=(9 xx 4)/(15 xx 4)=36/60`
`13/20=(13 xx 3)/(20 xx 3)=39/60`
Vì: `36<39<42<48`
Do đó: `36/60<39/60<42/60<48/60`
Hay: `9/15<13/20<7/10<4/5`
Sắp xếp: `9/15;13/20;7/10;4/5`
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