35+46=
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![](https://rs.olm.vn/images/avt/0.png?1311)
![](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)
![](https://rs.olm.vn/images/avt/0.png?1311)
35 x 146 - 7 x 46 x 5 24 x 35 + 35 x 76
= 35 x 146 - 7 x 5 x 46 = 35 x ( 24 + 76 )
= 35 x 146 - 35 x 46 = 35 x 100
= 35 x ( 146 - 46 ) = 3500
= 35 x 100
= 3500
= 35 x ( 146 - 46) / 35 x ( 24 + 76)
= 35 x 100 / 35 x 100
= 1
![](https://rs.olm.vn/images/avt/0.png?1311)
A = \(\frac{40}{31\cdot39}+\frac{35}{39\cdot46}+\frac{30}{46\cdot52}+\frac{25}{52\cdot57}\)
A= \(5.\left(\frac{8}{31\cdot39}+\frac{7}{39\cdot46}+\frac{6}{46\cdot52}+\frac{5}{52\cdot57}\right)\)
A= \(5\cdot\left(\frac{1}{31}-\frac{1}{39}+\frac{1}{39}-\frac{1}{46}+\frac{1}{46}-\frac{1}{52}+\frac{1}{52}-\frac{1}{57}\right)\)
A= \(5.\left(\frac{1}{31}-\frac{1}{57}\right)\)
A= \(5.\left(\frac{26}{1767}\right)\)
A = \(\frac{130}{1767}\)
![](https://rs.olm.vn/images/avt/0.png?1311)
a, =46x(-217+117) =46x(-100)=-4600
b, =-25x(78-28)=-25x50=-1250
c,=35(-63-23)=35x(-86)=3010
![](https://rs.olm.vn/images/avt/0.png?1311)
* 4 x 1930 x 3 + 6 x 70 x 2
= (4 x 3 ) x 1930 + (6 x 2 ) x 70
= 12 x 1930 + 12 x 70
= 12 x (1930 + 70 )
= 12 x 2000
= 24000
* 8 x 427 x 3 + 6 x 573 x 4
= ( 8 x 3 ) x 427 + (6 x 4 ) x 573
= 24 x 427 + 24 x 573
= 24 x ( 427 + 573 )
= 24 x 1000
= 24000
* 117x (35 + 46 ) - 17 x (35 + 46 )
= ( 117 - 17 ) x ( 35 + 46 )
= 100 x 81
= 8100
81
81