a, Ta có
\(\dfrac{111}{37}< x< \dfrac{91}{37}\Leftrightarrow3< x< 7\Leftrightarrow x\in\left\{4,5,6\right\}\)
b,Ta co
\(\dfrac{-84}{14}< 3x< \dfrac{108}{9}\Leftrightarrow3.\dfrac{-28}{14}< 3x< 3.\dfrac{36}{9}\Leftrightarrow\dfrac{-28}{14}< x< \dfrac{36}{9}\Leftrightarrow-2< x< 4\Leftrightarrow x\in\left\{-1,0,1,2,3\right\}\)
a)\(\dfrac{-1}{4}.13\dfrac{9}{11}-0,25.6\dfrac{2}{11}\)
b)\(\dfrac{4}{9}:\left(\dfrac{-1}{7}\right)+6\dfrac{5}{9}:\left(\dfrac{-1}{7}\right)\)
Các bạn giúp mik nha mik sẽ tick và kết bạn. Thank you
\(\dfrac{-5}{11}\)+(\(\dfrac{-6}{11}\)+1)
Mong các bạn giúp
thank you m.n
tính hợp lí:
a)\(\left(4\dfrac{5}{37}-3\dfrac{4}{5}+8\dfrac{15}{29}\right)-\left(3\dfrac{5}{37}-6\dfrac{14}{29}\right)\)
b) \(60\dfrac{7}{13}+50\dfrac{8}{13}-11\dfrac{2}{13}\)
c) \(\dfrac{\dfrac{2}{3}+\dfrac{2}{7}-\dfrac{1}{14}}{-1-\dfrac{3}{7}+\dfrac{3}{28}}\)
2,25:\(\dfrac{-6}{25}\)=??
Các bạn giúp mk vs nha
THANK YOU M.N
Tính:
a. 75% - 1\(\dfrac{1}{2}\).\(\dfrac{4}{3}\) + 1,5 : \(\dfrac{-9}{4}\)- (-\(\dfrac{1}{2}\))2
b. \(\dfrac{-4}{9}\).\(\dfrac{6}{13}\) + 7\(\dfrac{4}{9}\) - \(\dfrac{4}{9}:\dfrac{13}{7}-5\dfrac{4}{9}\) - 2
Tìm x:
a. \(\dfrac{7}{12}-\left(x+\dfrac{7}{10}\right):\dfrac{6}{5}=\dfrac{-5}{4}\)
b. x \(\in\) Z, -1 \(\le\) \(\dfrac{x}{5}\) < 0
*Lm nhanh nha, mk cần gấp
tìm x biết
a,\(\dfrac{x}{13}=\dfrac{35}{91}\)
b,\(\dfrac{9+x}{13-x}=\dfrac{5}{6}\)
c,\(x+x:5\cdot7,5+x:2\cdot9=315\)
BT1: Tìm x, biết:
4) \(\dfrac{-8}{13}+\dfrac{-7}{17}+\dfrac{21}{13}\le x\le\dfrac{-9}{14}+3+\dfrac{5}{-14}\)
1) Quy đồng mẫu:
a) \(\dfrac{4}{7};\dfrac{13}{9};\dfrac{8}{21}\)
b)\(\dfrac{1}{-36};\dfrac{-8}{45};\dfrac{13}{90}\)
c)\(3;-1;\dfrac{17}{23}\)
các bạn giúp mình với mai mk nộp co cô rùi
cho:
A=\(\dfrac{40}{31.38}+\dfrac{35}{39.46}+\dfrac{30}{2392}+\dfrac{25}{29.62}\)
B=\(\dfrac{91}{19.31}+\dfrac{65}{19.43}+\dfrac{29}{989}+\dfrac{143}{1311}\)
Tính tỷ số \(\dfrac{A}{B}\)
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