Tính:(chi tiết)
a)5/-12 + -1/20
b)-24/48 + 333/555
c)4/7 + (-2)
K
Khách
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Những câu hỏi liên quan
14 tháng 2 2022
a: \(=\dfrac{-5}{8}+\dfrac{7}{12}=\dfrac{-15}{24}+\dfrac{14}{24}=\dfrac{-1}{24}\)
b: \(=\dfrac{3}{4}-\dfrac{5}{6}+\dfrac{11}{12}=\dfrac{9}{12}-\dfrac{10}{12}+\dfrac{11}{12}=\dfrac{10}{12}=\dfrac{5}{6}\)
c: \(=\dfrac{6}{36}-\dfrac{1}{36}=\dfrac{5}{36}\)
d: \(=\dfrac{5}{12}+\dfrac{5}{12}=\dfrac{10}{12}=\dfrac{5}{6}\)
e: \(=\dfrac{-8}{56}-\dfrac{7}{56}=\dfrac{-15}{56}\)
f: \(=\dfrac{-5}{15}+\dfrac{3}{25}=\dfrac{-25}{75}+\dfrac{9}{75}=\dfrac{-16}{75}\)
11 tháng 6 2018
a) ( 2011 - 125 x 8 : 4 ) x ( ( 48 : 8 x 6 )
= ( 2011 - 1000 : 4 ) x ( 6 x 6 )
= ( 2011 - 250 ) x 36
= 1761 x 36
= 63396
b) B = Không hiểu
c) C =
TT
3
22 tháng 2 2022
\(\dfrac{2}{5}+\dfrac{1}{3}=\dfrac{6+5}{15}=\dfrac{11}{15}\)
\(\dfrac{16}{24}+\dfrac{1}{3}=\dfrac{2}{3}+\dfrac{1}{3}=1\)
\(\dfrac{7}{12}+\dfrac{4}{6}+\dfrac{3}{8}=\dfrac{14}{24}+\dfrac{16}{24}+\dfrac{9}{24}=\dfrac{39}{24}=\dfrac{13}{8}\)
\(1+\dfrac{1}{12}=\dfrac{12+1}{12}=\dfrac{13}{12}\)
TL
4
\(\dfrac{5}{-12}+\dfrac{-1}{20}\)
\(=\dfrac{-5}{12}+\dfrac{-1}{20}\)
\(\dfrac{-25}{60}+\dfrac{-3}{60}\)
\(=\dfrac{-28}{60}=\dfrac{-7}{15}\)
\(\dfrac{-24}{48}+\dfrac{333}{555}\)
\(=\dfrac{-1}{2}+\dfrac{3}{5}\)
\(=\dfrac{-5}{10}+\dfrac{6}{10}\)
\(=\dfrac{1}{10}\)
\(\dfrac{4}{7}+\left(-2\right)\)
\(=\dfrac{4}{7}+\dfrac{-14}{7}\)
\(=\dfrac{-10}{7}\)