=1,75.(−1621)−(133+2,25):15860
=−4,3−7912:7930
=−43−52
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G = 1,75 x (-16/21) - (13/3 + 2,25) : 158/60
a)dfrac{2}{3}x-1dfrac{3}{2}b)| 5x - dfrac{1}{2}| - dfrac{2}{7} 25%c)dfrac{x-3}{4}dfrac{16}{x-3}d)dfrac{-8}{13}+dfrac{7}{17}+dfrac{21}{31}x≤dfrac{-9}{14}+4+dfrac{5}{-14}(xϵZ)
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a)\(\dfrac{2}{3}\)x-1=\(\dfrac{3}{2}\)
b)| 5x - \(\dfrac{1}{2}\)| - \(\dfrac{2}{7}\)= 25%
c)\(\dfrac{x-3}{4}\)=\(\dfrac{16}{x-3}\)
d)\(\dfrac{-8}{13}\)+\(\dfrac{7}{17}+\dfrac{21}{31}\)<x≤\(\dfrac{-9}{14}\)+4+\(\dfrac{5}{-14}\)(xϵZ)
\(a,\dfrac{3}{5}+\dfrac{-5}{9}\)
\(b,\dfrac{1}{3}+\dfrac{-4}{3};\dfrac{4}{7}\)
\(c,-\dfrac{27}{23}+\dfrac{5}{21}+\dfrac{4}{23}+\dfrac{16}{21}+\dfrac{1}{2}\)
\(d,\dfrac{-8}{9}+\dfrac{1}{9}.\dfrac{2}{9}+\dfrac{1}{9}.\dfrac{7}{9}\)
Tính hợp lý:
\(a.\dfrac{-3}{5}+\dfrac{7}{21}+\dfrac{-4}{5}+\dfrac{7}{5}\) \(b.\dfrac{-3}{17}+\left(\dfrac{2}{3}+\dfrac{3}{17}\right)\)
\(c.\dfrac{-5}{21}+\left(\dfrac{-16}{21}+1\right)\)
Bài 4: So sánh:
a. \(\dfrac{2}{3}\)và\(\dfrac{1}{4}\)
b. \(\dfrac{7}{10}\)và\(\dfrac{7}{8}\)
c. \(\dfrac{6}{7}\)và\(\dfrac{3}{5}\)
d. \(\dfrac{14}{21}\)và\(\dfrac{60}{72}\)
15 tháng 1 2022 lúc 19:43
1. tìm các số chưa biết :a) dfrac{4}{3} dfrac{8}{x}dfrac{-y}{21}dfrac{-40}{z}dfrac{16}{t}dfrac{y}{111}b) dfrac{-7}{6}dfrac{x}{18}dfrac{-98}{y}dfrac{14}{y}dfrac{-14}{z}dfrac{t}{102}dfrac{4}{-78}2. tìm x biết :a) dfrac{2}{x}dfrac{x}{8}b) dfrac{2x-9}{240}dfrac{39}{80}c) dfrac{x-1}{9}dfrac{8}{3}mn giúp mk nha :
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1. tìm các số chưa biết :
a) \(\dfrac{4}{3}\)= \(\dfrac{8}{x}\)=\(\dfrac{-y}{21}\)=\(\dfrac{-40}{z}\)=\(\dfrac{16}{t}\)=\(\dfrac{y}{111}\)
b) \(\dfrac{-7}{6}=\dfrac{x}{18}=\dfrac{-98}{y}=\dfrac{14}{y}=\dfrac{-14}{z}=\dfrac{t}{102}=\dfrac{4}{-78}\)
2. tìm x biết :
a) \(\dfrac{2}{x}=\dfrac{x}{8}\)
b) \(\dfrac{2x-9}{240}=\dfrac{39}{80}\)
c) \(\dfrac{x-1}{9}=\dfrac{8}{3}\)
mn giúp mk nha :>
a)\(2\dfrac{3}{3}.4.\left(-0,4\right)+1\dfrac{3}{5}.1,75+\left(-7,2\right):\dfrac{9}{11}\)
b)\(\left(\dfrac{1}{24}-\dfrac{5}{16}\right):\dfrac{-3}{8}+1^{10}.\left(-5\right)^0\)
bài 3 thực hiện phép tínhadfrac{5}{8}+dfrac{3}{17}+dfrac{4}{18}+dfrac{20}{-17}+dfrac{-2}{9}+dfrac{21}{56}bleft(dfrac{9}{16}+dfrac{8}{-27}right)+left(1+dfrac{7}{16}+dfrac{-19}{27}right)cleft(dfrac{13}{5}+dfrac{7}{16}right)+left(dfrac{-15}{16}+dfrac{6}{15}right) d left(6-2dfrac{4}{5}right).3dfrac{1}{8}-1dfrac{3}{5}:dfrac{1}{4}
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bài 3 thực hiện phép tính
a\(\dfrac{5}{8}+\dfrac{3}{17}+\dfrac{4}{18}+\dfrac{20}{-17}+\dfrac{-2}{9}+\dfrac{21}{56}\)
b\(\left(\dfrac{9}{16}+\dfrac{8}{-27}\right)+\left(1+\dfrac{7}{16}+\dfrac{-19}{27}\right)\)
c\(\left(\dfrac{13}{5}+\dfrac{7}{16}\right)+\left(\dfrac{-15}{16}+\dfrac{6}{15}\right)\) d \(\left(6-2\dfrac{4}{5}\right).3\dfrac{1}{8}-1\dfrac{3}{5}:\dfrac{1}{4}\)
Tìm x biết: a) x . \(\dfrac{-3}{4}\) = \(\dfrac{2}{5}\) + \(\dfrac{3}{4}\) b) 1 - 1\(\dfrac{1}{5}\)x = 60%
c) \(\dfrac{1}{2}\)x + \(\dfrac{3}{2}\)x + x = 16