33/25:5/77
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![](https://rs.olm.vn/images/avt/0.png?1311)
77 . 25 + 5 . 77 + 77 . 14 + 33 . 77
= 77. ( 25 + 5 + 14 + 33 )
= 77 . 77
= 772
= 5929
~ Hok tốt ~
77 . 25 + 5 . 77 + 77 . 14 + 33 . 77
=77 . (25 + 5 + 14 + 33)
=77 . 77
=5929
Chúc bn học tốt! Kick cho mik nha!
![](https://rs.olm.vn/images/avt/0.png?1311)
a) -15x + 20 =-25
\(\Leftrightarrow\) -15x = -25 - 20 = -45
\(\Leftrightarrow\)x = 3
![](https://rs.olm.vn/images/avt/0.png?1311)
![](https://rs.olm.vn/images/avt/0.png?1311)
\(\frac{-63}{108}\)= \(\frac{-7}{12}\)
\(\frac{-33}{-77}\)= \(\frac{3}{7}\)
\(\frac{-5}{10}\)=\(\frac{-1}{2}\)
\(\frac{14}{63}\)=\(\frac{2}{9}\)
\(\frac{-15}{25}\)=\(\frac{-3}{5}\)
\(\frac{-45}{18}\)=\(\frac{-5}{2}\)
\(\frac{12}{15}\)=\(\frac{4}{5}\)
\(\frac{20}{25}\)=\(\frac{4}{5}\)
\(\frac{31}{12}\):Là phân số tối giản
t.i.c.k nha
![](https://rs.olm.vn/images/avt/0.png?1311)
a/ 3 + 2387 : 77 - 33
= 3 + 31 - 33
= 31 + ( 3 - 33)
= 31 + (-30)
= 1
b/ 8 x 33 x 25 x 125 x 4
= (8 x 125) x (4 x 25) x 33
= 1000 x 100 x 33
= 100000x 33
= 3300000
c/ 20, 16 : 0,01
= 2016 : 1
= 2016
Thêm :
D, 8,6 - 2,75
E, 4\(\frac{3}{8}\)+ 5\(\frac{2}{3}\)
F, 3\(\frac{1}{5}\)- 1\(\frac{1}{5}\)+ \(\frac{2}{5}\)
G, \(\frac{2}{5}\)+ \(\frac{3}{5}\): \(\frac{4}{5}\)
H, \(\frac{5}{2}\)x \(\frac{1}{3}\)+ \(\frac{1}{4}\)
![](https://rs.olm.vn/images/avt/0.png?1311)
![](https://rs.olm.vn/images/avt/0.png?1311)
\(=\left(-67\right).\left(-33\right)-67.77+\left(-67\right).33-77.33\)
\(=\left[\left(-67\right).\left(-33\right)+\left(-67\right).33\right]-66.77-77.33\)
\(=-77\left(66+33\right)=-77.99=-7623\)
![](https://rs.olm.vn/images/avt/0.png?1311)
a)\(\frac{\text{125x21}}{27x25}\)=\(\frac{25x5x3x7}{3x9x25}\)=\(\frac{5x7}{9}\)=\(\frac{35}{9}\)
b)\(\frac{33x28}{84x77}\)=\(\frac{11x3x28}{28x3x11x7}\)=\(\frac{1}{7}\)
![](https://rs.olm.vn/images/avt/0.png?1311)
\(77^{33}=\left(11.7\right)^{33}=11^{33}.7^{33}=11^{33}.\left(7^3\right)^{11}=11^{33}.343\left(1\right)\)
\(33^{77}=\left(3.11\right)^{77}=3^{77}.11^{77}=\left(3^7\right)^{11}.11^{77}=2187^{11}.11^{77}\left(2\right)\)
Từ \(\left(1\right)+\left(2\right)\Leftrightarrow33^{77}>77^{33}\)
\(\frac{33}{25}\div\frac{5}{77}\)
= \(\frac{2541}{125}\)
Hok tốt
\(\frac{33}{25}\):\(\frac{5}{77}\)
=\(\frac{2541}{125}\)
~HT~