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= 9 x 25 - 4 x 25 - 25 x 5
= 25 x ( 9 - 4 - 5 )
= 25 x 0
= 0
Học tốt
![](https://rs.olm.vn/images/avt/0.png?1311)
35/46:(35/17+3/18)
35/46:227/102
35/46×102/227
1785/5221
![](https://rs.olm.vn/images/avt/0.png?1311)
2584 : 34 = 76
2740 : 57= 48 ( dư 4 )
3820 : 46 = 83 ( dư 2 )
14588 : 28= 521
5814 : 17= 342
26790 : 62= 432 ( dư 6 )
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a) \(38+42+46+50+54+58+62\)
\(=\left(38+62\right)+\left(42+58\right)+\left(46+54\right)+50\)
\(=100+100+100+50\)
\(=100\cdot3+50\)
\(=350\)
b) \(11+137+72+63+128+89\)
\(=\left(11+89\right)+\left(137+63\right)+\left(72+128\right)\)
\(=100+200+200\)
\(=300+200\)
\(=500\)
A) = (38 + 62) + (42 + 58) + (46 + 54) + 50
= 100 + 100 + 100 + 50
= 350
B) = (11 + 89) + (137 + 63) + (72 + 128)
= 100 + 200 + 200
= 500
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54 x 2 x 9 x 5
= 54 x 9 x 2 x 5
= 486 x 10
= 4860
246 x 62 + 246 x 38
= 246 x ( 62 + 38 )
= 246 x 100
= 24600
428 x 56 - 428 x 46
= 428 x ( 56 - 46 )
= 428 x 10
= 4280
54 x 2 x 9 x 5
= 108 x 45
= 4860
246 x 62 + 246 x 38
= 246 x ( 62 + 38 )
= 246 x 100
= 24600
428 x 56 - 428 x 46
= 428 x ( 56 - 46 )
= 428 x 10
= 4280
Chúc bạn học tốt nha !
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![](https://rs.olm.vn/images/avt/0.png?1311)
`18/25xx5/46-3/62`
`=9/115 - 3/62`
`= 213/7130`