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`2.24.25 + 3.41.16 + 6.2.8.17`
`= 48*25 + 48*41 + 48*2*17`
`= 48*(25+41+2*17)`
`= 48*(66+34)`
`= 48*100 `
`= 4800`
![](https://rs.olm.vn/images/avt/0.png?1311)
\(2.24.25+3.31.16+6.2.8.17\)
\(=48.25+48.31+48.34\)
\(=48.\left(25+31+24\right)\)
\(=48.90\)
\(=4320\)
![](https://rs.olm.vn/images/avt/0.png?1311)
3.18.25 + 3.41.16 + 6.2.8.17
= 3.18.25 + 3.16.41 + (6.8).(2.17)
= 48.25 + 48.41 + 48.34
= 48.(25 + 41 + 34)
= 48.100
= 4800
![](https://rs.olm.vn/images/avt/0.png?1311)
25 . 13 . 4 + 2 . 17 . 50
= 25 . 13 + 2 . 17 . 25 . 2
= 25 . 13 +
=100.13+100.17=(13+17).100=30.100=3000
b)=2.48+48.41+48.34
=48.(2+41+34)
=48.77
=3696
![](https://rs.olm.vn/images/avt/0.png?1311)
Sửa đề: 8666
8666*15+170*4333
=4333*(2*15+170)
=200*4333
=866600
![](https://rs.olm.vn/images/avt/0.png?1311)
A = 44 . 82 -22 + 18 . 44
= 44 . 82 - 4 + 18 . 44
= 44. ( 82 + 18 ) - 4
= 44 . 100 - 4
= 4400 - 4
= 4396
Ta có: \(A=44\cdot82-2^2+18\cdot44\)
\(=44\cdot\left(82+18\right)-4\)
\(=44\cdot100-4\)
\(=4400-4=4396\)
![](https://rs.olm.vn/images/avt/0.png?1311)
13: \(\left(-15\right)+8+7\)
\(=\left(-15\right)+\left(8+7\right)\)
=-15+15
=0
14: \(\left(-8\right)+2+6\)
\(=\left(-8\right)+\left(2+6\right)\)
=-8+8
=0
15: \(\left(-1\right)+3-2\)
\(=\left(-1-2\right)+3\)
=-3+3
=0
16: \(25-8-7\)
\(=25-\left(8+7\right)\)
=25-15
=10
17: \(8-2-6\)
\(=8-\left(2+6\right)\)
=8-8
=0
18: \(\left(-12\right)-3+15\)
\(=\left(-12-3\right)+15\)
=-15+15
=0
![](https://rs.olm.vn/images/avt/0.png?1311)
2.24.25 + 3.41.16 + 6.2.8.17
= ( 2.24 ).25 + ( 3.16 ).41 + ( 6.8 ) + ( 2.17 )
= 48 . 25 + 48 .41 + 48 . 34
= 48. ( 25 + 41 + 34 )
= 48 . 100
= 4800
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