ĐỌC TIẾP NHÉ

a: x=11/10-4/5=3/10

b: =3/7-2/7=1/7

a. x + 4/5 = 11/10 

   x           = 11/10 - 4/5

   x           = 3/10

b. 3/5 x 5/7 - 2/7

= 3/7 - 2/7

= 1/7

a)

= 5/27 + 2/3

= 5/27 + 18/27

= 23/27

b)

= 28/7 - 3/7

= 257

c)

= 14/168

= 1/12

d)

= 3/7 x 1/4

= 3/28

a)

= 5/27 + 2/3

= 5/27 + 18/27

= 23/27

b)

= 28/7 - 3/7

= 257

c)

= 14/168

= 1/12

d)

= 3/7 x 1/4

= 3/28

a: =(3/5+2/5)+(4/7+1/7+2/7)=1+1=2

b: =(12/13+8/13+6/13)+(2/7+5/7)=2+1=3

a) =\(\dfrac{21}{35}+\dfrac{10}{35}+\dfrac{4}{35}=\dfrac{21+10+4}{35}=\dfrac{35}{35}=1\)
b) =\(\dfrac{16}{24}+\dfrac{15}{24}-\dfrac{12}{24}=\dfrac{19}{24}\)
c) =\(\dfrac{35}{40}+\dfrac{80}{40}-\dfrac{24}{40}+\dfrac{120}{40}=\dfrac{35+80-24+120}{40}=\dfrac{211}{40}\)

a: =20/60+12/60-15/60=17/60

b: =7/8-1/4-2/5=7/8-2/8-2/5=5/8-2/5=25/40-16/40=9/40

c: =5/11-3/5+6/11=1-3/5=2/5

a: \(x+\dfrac{3}{7}=\dfrac{2}{5}+\dfrac{3}{10}=\dfrac{4}{10}+\dfrac{3}{10}=\dfrac{7}{10}\)

\(\Leftrightarrow x=\dfrac{7}{10}-\dfrac{3}{7}=\dfrac{49}{70}-\dfrac{30}{70}=\dfrac{19}{70}\)

b: \(\dfrac{19}{20}-x=\dfrac{8}{5}-\dfrac{3}{4}=\dfrac{32}{20}-\dfrac{15}{20}=\dfrac{17}{20}\)

=>x=19/20-17/20=2/20=1/10

c: \(\dfrac{7}{5}-x\cdot\dfrac{1}{4}=\dfrac{13}{20}\)

\(\Leftrightarrow x\cdot\dfrac{1}{4}=\dfrac{7}{5}-\dfrac{13}{20}=\dfrac{28}{20}-\dfrac{13}{20}=\dfrac{7}{20}\)

=>x=7/5

a) 

5/6+3/6= 8/6 = 4/3

b)

6/36= 1/6

a) 4/3

b) 1/6

c) 37/15

d) 3

Chết anh nhầm!!!

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x = 5/4 - 2/3

x = 7/12

a) 5/4 - x = 2/3

             x = 5/4 - 2/3

             x = 7/12

b) X : 2/5 + 3/10 = 5

    X : 2/5 = 5 - 3/10

    X : 2/5 = 47/10

    X         = 47/10 x 2/5

    X         = 47/25