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L
4
BH
25 tháng 8 2019
\(=\frac{3}{20}\left(44-26\right)=\frac{3}{20}\cdot18=\frac{27}{10}\)
25 tháng 8 2019
Bài làm
\(-\frac{3}{4}.26\frac{1}{5}+\frac{3}{4}.44\frac{1}{5}\)
\(=\frac{3}{4}.\left(-\frac{131}{5}\right)+\frac{3}{4}.\left(\frac{221}{5}\right)\)
\(=\frac{3}{4}.\left(-\frac{131}{5}+\frac{221}{5}\right)\)
\(=\frac{3}{4}.\frac{90}{5}\)
\(=\frac{3}{2}.18\)
\(=27\)
# Học tốt #
CT
2
13 tháng 11 2016
\(\frac{3}{4}.26\frac{1}{5}-\frac{3}{4}.44\frac{1}{5}\)
\(=\frac{3}{4}.\left(26\frac{1}{5}-44\frac{1}{5}\right)\)
\(=\frac{3}{4}.\left(-18\right)\)\(=\frac{-27}{2}\)
13 tháng 11 2016
\(\frac{3}{4}.26\frac{1}{5}-\frac{3}{4}.44\frac{1}{5}\)
= \(\frac{3}{4}.\left(26\frac{1}{5}-44\frac{1}{5}\right)\)
= \(\frac{3}{4}\) . (-18)
= \(\frac{-27}{2}\)
CT
1
13 tháng 11 2016
\(\frac{3}{4}.26\frac{1}{5}-\frac{3}{4}44\frac{1}{5}\)
= \(\frac{3}{4}\left(26\frac{1}{5}-44\frac{1}{5}\right)\)
= \(\frac{3}{4}\left(26+\frac{1}{5}-44-\frac{1}{5}\right)\)
=\(\frac{3}{4}.\left(-18\right)\)
=-13,5
CT
1
13 tháng 11 2016
Ta có: 3/4. 26/1/5 - 3/4.44/1/5
= 3/4.(26/1/5-44/1/5)
= 3/4.(26-44)
= 3/4. (-18)
= -27/2
24 tháng 10 2019
\(\left(\frac{3}{7}-\frac{5}{2}-\frac{3}{5}\right)-\left(-\frac{4}{7}-\frac{3}{2}+\frac{2}{5}\right)=\frac{3}{7}-\frac{5}{2}-\frac{3}{5}+\frac{4}{7}+\frac{3}{2}-\frac{2}{5}\)
\(=\left(\frac{3}{7}+\frac{4}{7}\right)+\left(-\frac{5}{2}+\frac{3}{2}\right)+\left(-\frac{3}{5}-\frac{2}{5}\right)\)
\(=1+\left(-1\right)+\left(-1\right)\)
\(=-1\)
Hok tốt nha^^
NN
17 tháng 9 2020
\(\frac{3}{5}+\frac{3}{11}-\left(\frac{-3}{7}\right)+\frac{2}{97}-\frac{1}{35}-\frac{3}{4}+\left(\frac{-23}{44}\right)\)
\(=\frac{3}{5}+\frac{3}{11}+\frac{3}{7}+\frac{2}{97}-\frac{1}{35}-\frac{3}{4}-\frac{23}{44}\)
\(=\left(\frac{3}{5}+\frac{3}{7}-\frac{1}{35}\right)+\left(\frac{3}{11}-\frac{3}{4}-\frac{23}{44}\right)+\frac{2}{97}\)
\(=\left(\frac{21}{35}+\frac{15}{35}-\frac{1}{35}\right)+\left(\frac{12}{44}-\frac{33}{44}-\frac{23}{44}\right)+\frac{2}{97}\)
\(=\frac{35}{35}+\left(\frac{-44}{44}\right)+\frac{2}{97}=1+\left(-1\right)+\frac{2}{97}=\frac{2}{97}\)
17 tháng 9 2020
\(=\left(\frac{3}{5}+\frac{3}{7}-\frac{1}{35}\right)+\left(\frac{3}{11}-\frac{3}{4}-\frac{23}{44}\right)+\frac{2}{97}\)
\(=\left(\frac{21}{35}+\frac{15}{35}-\frac{1}{35}\right)+\left(\frac{12}{44}-\frac{33}{44}-\frac{23}{44}\right)+\frac{2}{97}\)
\(=-1+1+\frac{2}{97}\)
\(=\frac{2}{97}\)
LK
11 tháng 12 2019
Bài 1:
a) \(\left(\frac{9}{25}-2.18\right):\left(3\frac{4}{5}+0,2\right)\)
\(=\left(\frac{9}{25}-36\right):\left(\frac{19}{5}+\frac{1}{5}\right)\)
\(=\left(\frac{9}{25}-\frac{900}{25}\right):4\)
\(=-\frac{891}{25}.\frac{1}{4}\)
\(=-\frac{891}{100}\)
b) \(\frac{3}{8}.19\frac{1}{3}-\frac{3}{8}.33\frac{1}{3}\)
\(=\frac{3}{8}.\frac{58}{3}-\frac{3}{8}.\frac{100}{3}\)
\(=\frac{3}{8}\left(\frac{58}{3}-\frac{100}{3}\right)\)
\(=\frac{3}{8}\left(-\frac{42}{3}\right)\)
\(=\frac{3}{8}.\left(-14\right)\)
\(=-\frac{21}{4}\)
c) \(1\frac{4}{23}+\frac{5}{21}-\frac{4}{23}+0,5+\frac{16}{21}\)
\(=\frac{27}{23}+\frac{5}{21}-\frac{4}{23}+\frac{1}{2}+\frac{16}{21}\)
\(=\frac{27}{23}+\frac{5}{21}+\left(-\frac{4}{23}\right)+\frac{1}{2}+\frac{16}{21}\)
\(=\left[\frac{27}{23}+\left(-\frac{4}{23}\right)\right]+\left(\frac{5}{21}+\frac{16}{21}\right)+\frac{1}{2}\)
\(=1+1=2\)
d) \(\frac{21}{47}+\frac{9}{45}+\frac{26}{47}+\frac{4}{5}\)
\(=\frac{21}{47}+\frac{9}{45}+\frac{26}{47}+\frac{36}{45}\)
\(=\left(\frac{21}{47}+\frac{26}{47}\right)+\left(\frac{9}{45}+\frac{36}{45}\right)\)
\(=1+1=2\)
= -27/2 nha bn
học tốt
\(\frac{3}{4}\cdot26\frac{1}{5}-\frac{3}{4}\cdot44\frac{1}{5}\)
\(=\frac{3}{4}\cdot\frac{131}{5}-\frac{3}{4}\cdot\frac{221}{5}\)
\(=\frac{3}{4}\cdot\left(\frac{131}{5}-\frac{221}{5}\right)\)
\(=\frac{3}{4}\cdot\left(-18\right)\)
\(=-\frac{27}{2}\)