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`75/20 - x = 3/2 xx 10`
`15/4 - x = 15`
`x = 15/4 - 15`
`x = -45/4`
`(12 xx 15) - X xx 1/4 = 120 xx 1/4`
`180 - X xx 1/4 = 30`
`X xx 1/4 = 180-30`
`X xx 1/4 = 150`
`X = 150 : 1/4`
`X = 600`
\(\dfrac{15}{4}-x=15\)
\(x=\dfrac{15}{4}-15\)
\(x=-\dfrac{45}{4}\)
\(\left(12\times15\right)-\dfrac{1}{4}x=120\times\dfrac{1}{4}\)
\(180-\dfrac{1}{4}x=30\)
\(-\dfrac{1}{4}x=30-180\)
\(-\dfrac{1}{4}x=-150\)
\(-x=-150:\dfrac{1}{4}\)
\(-x=-150\times4\)
\(-x=-600\)
\(x=600\)
![](https://rs.olm.vn/images/avt/0.png?1311)
![](https://rs.olm.vn/images/avt/0.png?1311)
\(56.0,75+56.0,25+0,25+75%\)%
\(=56.0,75+56.0,25+0,25+75:100\)
\(=56.0,25.3+56.0,25+0,25.1+0,25.3\)
\(=0,25.(56.3+56+1+3)\)
\(=0,25.228\)
\(=57\)
\(#YH\)
\(#NBaoNgoc\)
![](https://rs.olm.vn/images/avt/0.png?1311)
\(10\times y=84,75+15,25\)
\(\Rightarrow10\times y=100\)
\(\Rightarrow y=100:10\)
\(\Rightarrow y=10\)
10 x y = 84,75 + 15,25
10 x y = 100
y = 100 : 10
y = 10
:)))
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\(\dfrac{15}{24}-\dfrac{3}{8}-\dfrac{1}{6}=\dfrac{5}{8}-\dfrac{3}{8}-\dfrac{1}{6}=\dfrac{1}{4}-\dfrac{1}{6}=\dfrac{1}{12}\)
\(\dfrac{7}{13}\cdot\dfrac{5}{24}\cdot\dfrac{39}{75}=\dfrac{39}{13}\cdot\dfrac{5}{75}\cdot\dfrac{7}{24}=3\cdot\dfrac{1}{15}\cdot\dfrac{7}{24}=\dfrac{35}{24}\)
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1 . 37,9 x 2,5 + 37,9 x 7,5
= 37,9 x ( 2,5 + 7,5 )
= 37,9 x 10
= 379 .
2. 42,8 x 12,9 - 42,8 x 29
= 42 ,8 x ( 12,9 - 29 )
= 42,8 x - 16,1
= - 689,08.
3 , 14,65 x 75 + 14,65 x 40 - 14,65 x 15
= 14,65 x ( 75 + 40 - 15 )
= 14,65 x 100
= 1465 .
4 , 84 ,96 x 135 - 84,96 x 65 + 84,96 x 30
= 84,96 x ( 135 - 65 + 30 )
= 84,96 x 100
= 8496
* Hok tốt !
# Miu
67,53 . 15 + 75 . 67,53 + 67,53 . 10
= 67,53 . ( 75 + 15 +10 )
= 67,53 . 100
= 6753
=67,53x(15+75)+675,3
=6753+675,3
=7428,3