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650 x 34 + 34 x 2 x 135 + 34 x 80
= 650 x 34 + 34 x 270 + 34 x 80
= 34 x ( 650 + 270 + 80 )
= 34 x 1000
= 34000
Tick nha
650 x 34 + 34 x 2 x 135 + 34 x 80
= 650 x 34 + 34 x 270 + 34 x 80
= 34 x ( 650 + 270 + 80 )
= 34 x 1000
= 34000
![](https://rs.olm.vn/images/avt/0.png?1311)
=(2.34).135+(17.2).80+650.34
=34.(135+135+80+650)
=34.900
=30600
![](https://rs.olm.vn/images/avt/0.png?1311)
C1:
a) 135 x 54 + 45 x 135 + 135
= 135 x ( 54 + 45 + 1)
=135x100=13500
C2
a) 135 x 54 + 45 x 135 + 135
= 7290 + 6075 +135
= 13500
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36x17+12x34+6x30
=6x6x17+6x2x34+6x30
=6x102+6x68+6x30
=6x(102+68+30)
=6x200
=1200
=12x3x17 + 12x34 + 6x2x15
=12x51 + 12x34 + 12x15
= 12x(51+34+15)
=12x100
=1200
![](https://rs.olm.vn/images/avt/0.png?1311)
`23/34 xx 17/15 xx5/46`
`= 23/30 xx 5/46`
`= 1/12`
![](https://rs.olm.vn/images/avt/0.png?1311)
28 x 34 - 17 x 56 + 1000
= 28 x 34 - 17 x 2 x 28 + 1000
= 28 x 34 - 34 x 28 + 1000
= 28 x (34 - 34) + 1000
= 28 x 0 + 1000
= 0 + 1000 = 1000
![](https://rs.olm.vn/images/avt/0.png?1311)
a) 135 - ( x + 37 ) = 80
( x + 37 ) = 135 - 80
( x + 37 ) = 55
x = 55 - 37
x = 18
b) ( x - 17 ) + 52 = 158
( x - 17 ) = 158 - 52
( x - 17 ) = 106
x = 106 + 17
x = 123
a) 135 - ( x + 37 ) = 80
x + 37 = 135 - 80
x + 37 = 55
x = 55 - 37
x = 18
b) ( x - 17 ) + 52 = 158
x - 17 = 158 - 52
x - 17 = 106
x = 106 + 17
x = 123
![](https://rs.olm.vn/images/avt/0.png?1311)
\(\dfrac{23}{34}x\dfrac{17}{15}x\dfrac{5}{46}=\dfrac{23x17x5}{34x15x46}=\dfrac{1}{12}\)