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a) 5,4 x 1,2 - 1,06 x4 + 15,2 x 2,5 b) 8,3 x (6,25- 1,27): 0,25
= 6,48- 4,24 + 38 = (8,3 x 4,98) : 0,25
= 2,24 + 38 = 41,334 : 0,25
= 40,24 = 165,336
c) (34,08 - 41,2 x 0,75 ) x 10,2 d) (31,02+ 1998x 0,01): 0,25
= 3,18 x 10,2 = 51 : 0,25
= 32,436 = 204
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a) 1,25 x 16,84 = 21,05 ; 1,2 x 15,8 = 18,96.
b) 12,48 : 0,5 x 6,25 x 4 x 2 : 2 x 3,12x 1,25 : 0,25 x 10 = 32448.
k mình nha
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12 , 48 : 0 , 5 x 6 , 25 x 4 x 2 2 x 3 , 12 x 1 , 25 : 0 , 25 x 10 = 12 , 48 x 2 x 6 , 25 x 4 x 2 2 x 3 , 12 x 1 , 25 x 4 x 10 = 4 x 5 x 2 10 = 4
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a) \(210:x=2,1:0,25=8,4\)
\(x=210:8,4=25\)
b) \(x.2+x.0,5=6,25\)
\(2,5x=6,25\)
\(x=6,25:2,5=2,5\)
c) \(x:0,25-x=15,6\)
\(3x=15,6\)
\(x=5,2\)
d) \(x:12,5=3,75.4=15\)
\(x=15.12,5=187,5\)
e) \(x.12,6-x.5,6=42\)
\(7x=42\)
\(x=6\)
g) \(x:0,1-x:4-x.0,75=2,25\)
\(10x-\dfrac{x}{4}-\dfrac{3x}{4}=2,25\)
\(9x=2,25\)
\(x=0,25\)
![](https://rs.olm.vn/images/avt/0.png?1311)
2,68 x 25% + 3,27 x 0,25 + 2,3 x \(\dfrac{1}{4}\) + 1,75:4
2,68 x 0,25 + 3,27 x 0,25 + 2,3 x 0,25 + 1,75 x 0,25
= 0,25 x (2,68 + 3,27 + 2,3 + 1,75)
= 0,25 x [ (2,68 + 3,27 + 1,75) + 2,3]
= 0,25 x [7,7 + 2,3]
= 0,25 x 10
= 2,5
5,4 x 1,2 - 1,06 x 4 + 15,2 x 2,5 = 40,24
8,3 x (6,25 - 1,75) : = 37,35
tRẢ LWOFI :....................................................
6,48 - 4,24 + 38
= 2,24 + 38
= 40,24
8,3 x 4,5 : 0,25
= 8,3 x 18
= 149,4
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k nhé