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![](https://rs.olm.vn/images/avt/0.png?1311)
a. ( 6,28 + 3,72) x 18,24
= 10 x 18,24 = 182,4
b. 35,7 x 99 + ( 35 + 0,7 )
= 35,7 x 99 + 35,7
= 35,7 x ( 99 +1 )
= 35,7 x 100
= 357
c. 17,34 x 99 + ( 18 - 0,66)
= 17,34 x 99 + 17,34
= 17,34 x ( 99 + 1)
= 17,34 x 100
= 1734
d. 0,9 x 95 + 0,9 x 2 x 2 + 0,9
= 0,9 x ( 95 + 2 x 2 + 1)
= 0,9 x 100
= 90
e. (0,25 x 40) x 611,7
= 10 x 611,7
= 6117
g. 37,2 x 101 - 37 - 0,2
= 37,2 x 101 - (37 + 0,2)
= 37,2 x 101 - 37,2
= 37,2 x ( 101 - 1)
= 372
a) \(6,28\cdot18,24+18,24\cdot3,72\)
\(=18,24\left(6,28+3,72\right)\)
\(=18,24\cdot10\)
\(=182,4\)
b) \(35,7\cdot99+35+0,7\)
\(=35,7\cdot99+35,7\)
\(=35,7\left(99+1\right)\)
\(=35,7\cdot100\)
\(=3570\)
c) \(17,34\cdot99+18-0,66\)
\(=17,34\cdot99+17,34\)
\(=17,34\left(99+1\right)\)
\(=17,34\cdot100\)
\(=1734\)
d) \(0,9\cdot95+1,8\cdot2+0,9\)
\(=0,9\cdot95+0,9\cdot2\cdot2+0,9\)
\(=0,9\left(95+4+1\right)\)
\(=0,9\cdot100\)
\(=90\)
e) \(0,25\cdot611,7\cdot40\)
\(=\left(40\cdot0,25\right)\cdot611,7\)
\(=10\cdot611,7\)
\(=6117\)
g) \(37,2\cdot101-37-0,2\)
\(=37,2\cdot101-37,2\)
\(=37,2\left(101-1\right)\)
\(=37,2\cdot100\)
\(=3720\)
![](https://rs.olm.vn/images/avt/0.png?1311)
a) 6,28 x 18,24 + 18,24 x 3,72 = (6,28 + 3,72) x 18,24 = 10 x 18,24 = 182,4. b) 35,7 x 99 + 35 + 0,7 = 35,7 x (99 + 1) = 35,7 x 100 = 3570. c) 17,34 x 99 + 18 – 0,66 = 17,34 x 99 + 17,34 = 17,34 x (99 + 1) = 17,34 x 100 = 1734. | d) 0,9 x 95 + 1,8 x2 + 0,9 = 0,9 x (95 + 1) + 0,9 x 4 = 0,9 x (96 + 4) = 0,9 x 100 = 90. e) 0,25 x 611,7 x 40 = 10 x 611,7 = 6117. g) 37,2 x 101 – 37 – 0,2 = 37,2 x 101 - 37,2 = 37,2 x (101 - 1) = 37,2 x 100 = 3720. |
a ) 18,24 x ( 6,28 + 3,72 )
=18,24 x 10
= 182,4
b) 35,7 x 99 + 35,7 x 1
= 35,7 x ( 99 + 1 )
= 35,7 x 100 = 3570
c) 17,34 x 99 + 17,34 x 1
= 17,34 x ( 99 + 1 )
= 17,34 x 100 = 1734
d) 0,9 x 95 + 0,9 x 4 + 0,9 x 1
= 0,9 x ( 95 + 4 +1 )
= 0,9 x 100 = 90
e) ( 0,25 x 40 ) x 611,7
= 10 x 611,7 = 6117
g) ( 37,2 x 100 ) + ( 37,2 - ( 37 + 0,2 ))
= 37200 + ( 37,2 - 37,2 )
= 37200 + 0 = 37200
![](https://rs.olm.vn/images/avt/0.png?1311)
17,34 × 99 + 18 - 0,66
\(=1716,66+18-0,66\)
\(=1716,66-0,66+18\)
\(=1716+18\)
\(=1734\)
chúc bạn học tốt
![](https://rs.olm.vn/images/avt/0.png?1311)
![](https://rs.olm.vn/images/avt/0.png?1311)
![](https://rs.olm.vn/images/avt/0.png?1311)
a) 17,34 x 99 + 18 - 0,66
= 17,34 x 99 + 17,34 x 1
= 17,34 x (99 + 1)
= 17,34 x 100
= 1734
b) 7,63 x 12,47 + 12,47 x 2,37
= 12,47 x (7,63 + 2,37)
= 12,47 x 10
= 124,7
c) 112,37 x 4,29 - 4,29 x 12,37
= 4,29 x (112,37 - 12,37)
= 4,29 x 100
= 429
d) 17,4 x 52 + 57 x 17,4 - 17,4 x 9
= 17,4 x (52 + 57 - 9)
= 17,4 x 100
= 1740
![](https://rs.olm.vn/images/avt/0.png?1311)
= (8x15x24x35x...x99) / (9x16x25x36x...x100)
= (4x2x5x3x6x2x2x5x7x...x9x11) / (9x4x2x2x5x5x6x3x2x...x25x4)
= 11/(4x25)
= 11/100
Mình không chắc lắm
A = 35 , 7 x 99 + 35 + 0 , 7
A = 35 ,7 x 99 + 35 , 7
A = 35 , 7 x ( 99 + 1 )
A = 35 , 7 x 100
A = 3570
B = 17 , 34 x 99 + 18 - 0 , 66
B = 17 , 34 x 99 + 17 , 34
B = 17 , 34 x ( 99 + 1 )
B = 17 , 34 x 100
B = 1734
35.7*99+[35+0.7]
=35.7*99+35.7
=35.7*[99+1]
=3570