a) A = 15/12 + 5/13 + (-3/12) + (-18/13)

= (15/12 - 3/12) + (5/13 - 18/13)

= 1 - 1

= 0

b) B = 11/15 . (-19/13) + (-7/13) . 11/15

= 11/15.(-19/13 - 7/13)

= 11/15 . (-2)

= -22/15

c) C = 2022⁰ - (1/7)⁵ . 7⁵

= 1 - 1/7⁵ . 7⁵

= 1 - 1

= 0

A = [15/12 + (-3/12)] + [5/13 + ( -18/13)]
A =  12/12 + ( -13/13) 

A = 1 + (-1)

A = 0

B = 11/15 x [(-19/13) + ( -7/13)]

B = 11/15 x (-26/13)

B = 11/15 x (-2)

B = -22/15

C = 1 - 1 mũ 5

C = 1 - 1

C = 0

A= 0

B= - 22/15

C= 0

a: \(\dfrac{3}{5}-\dfrac{7}{4}=\dfrac{12}{20}-\dfrac{35}{20}=\dfrac{-23}{20}\)

b: \(\dfrac{4}{5}:\dfrac{-8}{15}=\dfrac{-4}{5}\cdot\dfrac{15}{8}=\dfrac{-60}{40}=\dfrac{-3}{2}\)

c: \(=7+\dfrac{5}{9}-2-\dfrac{3}{4}-3-\dfrac{5}{9}=2-\dfrac{3}{4}=\dfrac{5}{4}\)

d: \(=\dfrac{-3}{7}\left(\dfrac{4}{19}+\dfrac{15}{19}\right)+\dfrac{5}{7}=\dfrac{2}{7}\)

\(\frac{12}{15}\)+  \(\frac{4}{5}\)= \(\frac{8}{5}\)

Mn giúp mh với đg cần gấp lắm ln🥺🥺

a: \(=5^2+2^5-1=25+32-1=25+31=56\)

c: \(=\dfrac{-7}{25}\cdot\dfrac{39}{14}\cdot\dfrac{50}{78}\)

\(=\dfrac{-7}{14}\cdot\dfrac{39}{78}\cdot\dfrac{50}{25}=\dfrac{-1}{2}\)

d: \(=\left(\dfrac{3}{8}-\dfrac{3}{4}+\dfrac{7}{12}\right)\cdot\dfrac{6}{5}+\dfrac{1}{2}\)

\(=\dfrac{9-18+14}{24}\cdot\dfrac{6}{5}+\dfrac{1}{2}\)

\(=\dfrac{1}{4}+\dfrac{1}{2}=\dfrac{3}{4}\)

a. \(\frac{1}{3}.\frac{4}{5}+\frac{1}{3}.\frac{6}{5}-\)

\(=\frac{1}{3}(\frac{4}{5}+\frac{6}{5})-\frac{5}{3}\)

\(=\frac{1}{3}.2-\frac{5}{3}\)

\(=\frac{2}{3}-\frac{5}{3}\)

\(=-\frac{1}{1}\)

c. \(\frac{6}{7}.\frac{10}{9}+\frac{1}{7}.\frac{10}{9}-\frac{8}{9}\)

\(=\frac{10}{9}\left(\frac{6}{7}+\frac{1}{7}\right)-\frac{8}{9}\)

\(=\frac{10}{9}.1-\frac{9}{8}\)

\(=\frac{10}{9}-\frac{9}{8}\)

\(=-\frac{1}{72}\)

\(b\).\(\frac{4}{19}.\frac{-3}{7}+\frac{-3}{7}.\frac{15}{19}+\frac{5}{7}\)

\(=\frac{-3}{7}\left(\frac{4}{19}+\frac{15}{19}\right)+\frac{5}{7}\)

\(=\frac{-3}{7}+\frac{5}{7}\)

\(=\frac{2}{7}\)

mọi người ơiii ! giải giúp em với ạ :(((

1.

a) \(-\frac{15}{17}>-\frac{19}{21}\)

b)\(-\frac{13}{19}>-\frac{19}{23}\)

c)\(-\frac{23}{49}>-\frac{25}{47}\)

d)\(\frac{317}{633}>\frac{371}{743}\)

e)\(-\frac{24}{35}< -\frac{19}{30}\)

f)\(\frac{12}{17}< \frac{13}{18}\)

g) \(-\frac{17}{26}< -\frac{16}{27}\)

h) \(\frac{84}{-83}< -\frac{337}{331}\)

i) \(-\frac{1941}{1931}< -\frac{2011}{2001}\)

j) \(-\frac{1930}{1945}>-\frac{1996}{2001}\)

k) \(\frac{37}{59}< \frac{47}{59}\)

I) \(-\frac{25}{124}>-\frac{27}{100}\)

m) \(-\frac{97}{201}>-\frac{194}{309}\)

n) \(-\frac{189}{398}< -\frac{187}{394}\)

o) \(-\frac{289}{403}>-\frac{298}{401}\)

Mắm Tôm Nè UID FF 1104310266 

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