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\(=\frac{3}{20}\left(44-26\right)=\frac{3}{20}\cdot18=\frac{27}{10}\)
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 #
![](https://rs.olm.vn/images/avt/0.png?1311)
\(\frac{3}{4}\cdot26\frac{1}{5}-\frac{3}{4}\cdot44\frac{1}{5}\)
\(=\frac{3}{4}\cdot\frac{131}{5}-\frac{3}{4}\cdot\frac{221}{5}\)
\(=\frac{3}{4}\cdot\left(\frac{131}{5}-\frac{221}{5}\right)\)
\(=\frac{3}{4}\cdot\left(-18\right)\)
\(=-\frac{27}{2}\)
![](https://rs.olm.vn/images/avt/0.png?1311)
\(\frac{3}{4}.26\frac{1}{5}-\frac{3}{4}.44\frac{1}{5}\)
\(=\frac{3}{4}.\left(26\frac{1}{5}-44\frac{1}{5}\right)\)
\(=\frac{3}{4}.\left(-18\right)\)\(=\frac{-27}{2}\)
\(\frac{3}{4}.26\frac{1}{5}-\frac{3}{4}.44\frac{1}{5}\)
= \(\frac{3}{4}.\left(26\frac{1}{5}-44\frac{1}{5}\right)\)
= \(\frac{3}{4}\) . (-18)
= \(\frac{-27}{2}\)
![](https://rs.olm.vn/images/avt/0.png?1311)
\(\frac{3}{4}.26\frac{1}{5}-\frac{3}{4}44\frac{1}{5}\)
= \(\frac{3}{4}\left(26\frac{1}{5}-44\frac{1}{5}\right)\)
= \(\frac{3}{4}\left(26+\frac{1}{5}-44-\frac{1}{5}\right)\)
=\(\frac{3}{4}.\left(-18\right)\)
=-13,5
![](https://rs.olm.vn/images/avt/0.png?1311)
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
![](https://rs.olm.vn/images/avt/0.png?1311)
What if I "không thể" (can't)?
a) \(\left(-8,43.25\right).0,4\)
\(=\left(-8,43\right).\left(25.0,4\right)\)
\(=\left(-8,43\right).10\)
\(=-84,3\)
b) \(\dfrac{3}{4}.26\dfrac{1}{5}-\dfrac{3}{4}.44\dfrac{1}{5}\)
\(=\dfrac{3}{4}.\left(26\dfrac{1}{5}-44\dfrac{1}{5}\right)\)
\(=\dfrac{3}{4}.\left(-18\right)\)
\(=-\dfrac{27}{2}\)
c) \(2-1,8:\left(-0,75\right)\)
\(=2-\left(-2,4\right)\)
\(=2+2,4\)
\(=4,4\)
d) \(\left(-3\right)^2.\dfrac{1}{3}-\sqrt{49}+\left(-5\right)^3:\sqrt{25}\)
\(=9.\dfrac{1}{3}-7+\left(-125\right):5\)
\(=3-7-25\)
\(=-29\)
\(a,\left(-8,43.25\right).0,4=-210,75.0,4=-84,3\)
\(b,\dfrac{3}{4}.26\dfrac{1}{5}-\dfrac{3}{4}.44\dfrac{1}{5}=\dfrac{3}{4}.26,2-\dfrac{3}{4}.44,2\)
\(=\dfrac{3}{4}.\left(26,2-44,2\right)\)
\(=\dfrac{3}{4}.\left(-18\right)\)
\(=-13,5\)
\(c,2-1,8:\left(0,75\right)=2-2,4\)
\(=-0,4\)
![](https://rs.olm.vn/images/avt/0.png?1311)
\(26\dfrac{1}{7}:\dfrac{-3}{4}-44\dfrac{1}{7}:\dfrac{3}{4}\)
\(=\dfrac{183}{7}\cdot\dfrac{-4}{3}-\dfrac{309}{7}\cdot\dfrac{4}{3}\)
\(=\dfrac{4}{3}\left(-\dfrac{183}{7}-\dfrac{309}{7}\right)\)
\(=\dfrac{4}{3}\cdot\dfrac{492}{7}=\dfrac{656}{7}\)
\(26\dfrac{1}{5}.\dfrac{3}{4}-\dfrac{3}{4}.44\dfrac{1}{5}\)
\(=\dfrac{3}{4}.\left(26\dfrac{1}{5}-44\dfrac{1}{5}\right)\)
\(=\dfrac{3}{4}.-18\)
\(=-\dfrac{27}{2}\)