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các tại hạ cíu tui zớiiiiiiiiiiiiiiiiiiiii sắp phải đi thỉnh kinh òi huhuhuhuhu

a) \(\dfrac{7}{11}=1-\dfrac{4}{11}=1-\dfrac{8}{22}\)

    \(\dfrac{17}{23}=1-\dfrac{6}{23}\)

Vì \(\dfrac{8}{22}\) > \(\dfrac{6}{23}\) ⇒\(\dfrac{7}{11}>\dfrac{17}{23}\)

b) \(\dfrac{12}{48}\) = \(\dfrac{1}{4}\) = \(\dfrac{13}{52}\) < \(\dfrac{13}{27}\) 

Vì \(\dfrac{13}{52}< \dfrac{13}{27}\) ⇒ \(\dfrac{12}{48}< \dfrac{13}{27}\)  

a: \(=\dfrac{6\left(12-7\right)}{60}=\dfrac{6\cdot5}{6\cdot10}=\dfrac{5}{10}=\dfrac{1}{2}\)

b: \(=\dfrac{35\cdot\left(18-1\right)}{34\cdot7}=5\cdot\dfrac{1}{2}=\dfrac{5}{2}\)

c: \(=\dfrac{42\left(1-11\right)}{21\cdot\left(-15\right)}=2\cdot\dfrac{-10}{-15}=2\cdot\dfrac{2}{3}=\dfrac{4}{3}\)

d: \(=\dfrac{2^5\cdot3^2}{2^5\cdot3^3}=\dfrac{1}{3}\)

e: \(=\dfrac{-36\cdot14}{27\left(14+7\right)}=\dfrac{-36}{27}\cdot\dfrac{14}{21}=\dfrac{-4}{3}\cdot\dfrac{2}{3}=-\dfrac{8}{9}\)

Nhanh nhé

Lần sau bạn gõ latex nhé

Các bạn nhớ ghi cách làm ra nhé!

a, 24/-42 = -24/42= -4x6/7x6 =-4/7

b,-24/36 = -2x12/3x12 =-2/3

c,-8/56= -1x8/7x8 =-1/7

d,29/-87= -29/87 =-1x29/3x29 =-1/3

e, -3x35/42x9 =-1x3x5x7/6x7x3x3  =-1x5/3x6 =-5/18

f,-45045 / 6006000=-45x1001 /6000x1001=45/6000=3x15/15x400=3/400

\(a.\frac{-4}{7},b.\frac{-2}{3},c.\frac{-1}{7},d.\frac{-1}{3},e.\frac{-5}{18},f.\frac{-3}{400}\)

a) $420-(71+420)$

$=420-71-420$

$=-71$

b) $(35-120)+(120+410-35)$

$=35-120+120+410-35$

$=(35-35)+(-120+120)+410$

$=410$

c) $(320-15+49)-(85-51)$

$=320-15+49-85+51$

$=320+(-15-85)+(49+51)$

$=320+(-100)+100$

$=320$

d) $-(312+59)-(41+400+88)$

$=-312-59-41-400-88$

$=(-312-88)+(-59-41)-400$

$=-400+(-100)-400$

$=-500-400$

$=-900$

e) $(430-731)-(-731+430-56)$

$=430-731+731-430+56$

$=(430-430)+(-731+731)+56$

$=56$

f) $(1352-47)-(53-1000+1352)$

$=1352-47-53+1000-1352$

$=(1352-1352)+(-47-53)+1000$

$=(-100)+1000$

$=1000-100$

$=900$

h) $(-42)-(370+58)-(120-370)$

$=-42-370-58-120+370$

$=(-42-58)+(-370+370)-120$

$=-100-120$

$=-220$

$Toru$

Chịu

dễ

a ) − 1 < 1 ; b ) 9 15 > 7 15 ; c ) − 1 2 > − 7 12 ; d ) 71 20 < 4

a) Ta có : a + 1 > a - 1

=> \(\frac{1}{a+1}\) < \(\frac{1}{a-1}\)

a) \(\frac{1}{a+1}< \frac{1}{a}< \frac{1}{a-1}\Rightarrow\frac{1}{a+1}< \frac{1}{a-1}\)

b) \(\frac{23}{47}< \frac{23}{45}< \frac{24}{45}\Rightarrow\frac{23}{47}< \frac{24}{45}\)

c) \(\frac{12}{17}>\frac{1}{2}>\frac{7}{15}\Rightarrow\frac{12}{17}>\frac{7}{15}\)

d) \(\frac{34}{43}< \frac{35}{43}< \frac{35}{42}\Rightarrow\frac{34}{43}< \frac{35}{42}\)

Cảm ơn các bạn rất nhiều

b: 23/48<24/48=1/2

1/2=46/92<47/92

=>23/48<47/92

a: 14/35=2/5

b: 23/62=23/62

c: -33/143=-3/11

d: -53/81=-53/81

e: \(\dfrac{2^2\cdot5^2}{2^5\cdot5^4}=\dfrac{1}{2^3\cdot5^2}=\dfrac{1}{8\cdot25}=\dfrac{1}{200}\)