4/-33-5/11+-4/-33+-8/3
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TN
6
T
28 tháng 10 2023
\(\dfrac{11}{8}\cdot\left[\left(-\dfrac{5}{11}:\dfrac{13}{8}-\dfrac{5}{11}:\dfrac{13}{15}\right)+\dfrac{-6}{33}\right]+\dfrac{-3}{4}\)
\(=\dfrac{11}{8}\cdot\left[\left(-\dfrac{5}{11}\cdot\dfrac{8}{13}-\dfrac{5}{11}\cdot\dfrac{15}{13}\right)-\dfrac{2}{11}\right]-\dfrac{3}{4}\)
\(=\dfrac{11}{8}\cdot\left[-\dfrac{5}{11}\cdot\left(\dfrac{8}{13}+\dfrac{15}{13}\right)-\dfrac{2}{11}\right]-\dfrac{3}{4}\)
\(=\dfrac{11}{8}\cdot\left(-\dfrac{5}{11}\cdot\dfrac{23}{13}-\dfrac{2}{11}\right)-\dfrac{3}{4}\)
\(=\dfrac{11}{8}\cdot\left(-\dfrac{115}{143}-\dfrac{2}{11}\right)-\dfrac{3}{4}\)
\(=\dfrac{11}{8}\cdot\dfrac{-141}{143}-\dfrac{3}{4}\)
\(=-\dfrac{141}{104}-\dfrac{3}{4}\)
\(=-\dfrac{219}{104}\)
LB
2 tháng 5 2022
a)2/5+3/4
=23/20
b)2/5 + 3/10-1/2
=7/10-1/2
=1/5
c)8/11+8/33x3/4
=8/11 + 2/11
=10/11
tick cho mik nha mik cháy đen túi r
hok tốt
N
0
TQ
0
\(\dfrac{4}{-33}-\dfrac{5}{11}+\dfrac{-4}{-33}+\dfrac{-8}{3}\)
\(=\dfrac{4}{-33}-\dfrac{5}{11}+\dfrac{4}{33}+-\dfrac{8}{3}\)
\(=\left(\dfrac{4}{-33}+\dfrac{4}{33}\right)+\left(-\dfrac{5}{11}+\dfrac{-8}{3}\right)\)
\(=0+\left(\dfrac{-15}{33}+\dfrac{-88}{33}\right)\)
\(=0+\dfrac{-103}{33}=\dfrac{-103}{33}\)