3 x 2 x 4 x 12345 x 1324 x1435 x 1768 x 3465 x2543 x675 x 4356 = ?
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A = 12345 x 3 + 12345 x 2 + 12345 + 12345 x 4
A = 12345 x 3 + 12345 x 2 + 12345 x 1 + 12345 x 4
A = 12345 x (3 + 2 + 1 + 4)
A = 12345 x 10
A = 123450
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`Answer:`
1. \(25.\left\{32:[12-4+4.\left(16:8\right)]\right\}\)
\(=25.\left\{32:[12-4+4.2]\right\}\)
\(=25.\left\{32:[12-4+8]\right\}\)
\(=25.\left\{32:[8+8]\right\}\)
\(=25.\left\{32:16\right\}\)
\(=25.2\)
\(=50\)
2. \(2195.1952-952.427-1952.1768\)
\(=2195.1952-1952.1768-952.427\)
\(=\left(2195-1768\right).1925-952.427\)
\(=427.1952-952.427\)
\(=\left(1952-952\right).427\)
\(=1000.427\)
\(=427000\)
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a, (-4) . (+125) . (-25) . 6 . (-8)
=[ (-4) . (-25) ] . [ (+125) . (-8) ] . 6
= 100 . (-1000) . 6
= -100 000 . 6
= -600 000
b, 122 . (-12345) + 12345 . (-78)
= 12345 . [ (-122) + (-78) ]
= 12345 . (-200)
= -2 469 000
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![](https://rs.olm.vn/images/avt/0.png?1311)
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12345 x 17 + 23 x 12345 + 12345 + 12345 x 35 + 12345 x 24
= 12345 x 17 + 23 x 12345 + 12345 x 1 + 12345 x 35 + 12345 x 24
= 12345 x (17 + 23 + 1 + 35 + 24)
= 12345 x 100
= 1234500
=> 12345 x (17 + 23 + 1 + 35 + 24 )
=> 12345 x 100
=> 1234500
![](https://rs.olm.vn/images/avt/0.png?1311)
12345 x 17 + 23 x 12345 + 12345 + 12345 x 35 + 12345 x 24
= 12345 x 17 + 23 x 12345 + 12345 x 1 + 12345 x 35 + 12345 x 24
= 12345 x (17 + 23 + 1 + 35 + 24)
= 12345 x 100
= 1234500
![](https://rs.olm.vn/images/avt/0.png?1311)
12345 x 17 + 23 x 12345 + 12345 + 12345 x 35 + 12345 x 24
= 12345 x 17 + 23 x 12345 + 12345 x 1 + 12345 x 35 + 12345 x 24
= 12345 x (17 + 23 + 1 + 35 + 24)
= 12345 x 100
= 1234500