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= \(\dfrac{32}{19}\)(\(\dfrac{17}{33}\)+\(\dfrac{16}{33}\))-\(\dfrac{13}{19}\)(\(\dfrac{16}{33}\)+\(\dfrac{17}{33}\))=\(\dfrac{32}{19}\)-\(\dfrac{13}{19}\)=1
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33 + 33 + 33 + 33 - 120
= 33 x 4 - 120
= 132 - 120
= 12
Các bạn ủng hộ mik nha !!!
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\(5^{20}:\left(5^{15}\times15+5^{15}\times10\right)=5^{20}:\left[5^{15}\left(15+10\right)\right]=5^{20}:\left(5^{15}.25\right)=5^{20}:\left(5^{15}.5^2\right)=5^{20}:5^{17}=5^3=125\)
\(33.\left(-55\right)+\left(-33\right).44-33=33.\left(-55\right)+33.\left(-44\right)-33=33\left[\left(-55\right)+\left(-44\right)-1\right]=33.\left(-100\right)=-3300\)
![](https://rs.olm.vn/images/avt/0.png?1311)
33 x 55 + 33 x 66 - 33 x 21
= 33 x ( 55 + 66 - 21 )
= 33 x 100
= 3300
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a) 70 - 5 ( X-3)=45
5(x-3)=70-45
5(X-3)= 25
x-3=25:5
X-3=5
X=5+3=8
B) 3^x-12=15
3^x=12+15
3^x=27
3^x=3^3
=>x = 3
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`#040911`
`613.33 + 33.70+317.33`
`= 33. (613 + 317 + 70)`
`= 33. (930 + 70)`
`= 33. 1000 = 33000`
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![](https://rs.olm.vn/images/avt/0.png?1311)
(3333)33 = 331089
Chữ số tận cùng là....
Học tốt!!!
=27 nha
trl:
33 = 3.3.3 = 27
#._.