a,35x34+35x86+65x75+65x45

=35x(34+86)+65x(75+45)

=35x120+65x120

=120x(35+65)

=120x100

=12000

b,3x25x8+4x37x6+2x38x12

=(3x8)x25+(4x6)x37+(2x12)x38

=24x25+24x37+24x38

=24x(25+37+38)

=24x(62+38)

=24x100

=2400

c,12x53+53x172-53x84

=53x(12+172-84)

=53x(184-84)

=53x100

=5300

a.35x(34+86)+65x(75+45)=35x120+65x120=120x(35+65)=120x100=12000

b.3x25x8+4x37x6x2x38x12=24x25+24x37+24x38=24x(25+37+38)=24x100=2400

c.53x(12+172-84)=53x100=5300

a)  35x34+35x86+65x75+65x45

=35.(34+86)+65.(75+45)

=35.120+65.120

=120.(35+65)

=120.100

=12 000

b)   3x25x8+4x37x6+2x38x12

=75.8+148.6+76.12

= 600+888   +912

=2400

c)12x53+53x172-53x84

=53.(12+172-84)

=53.100

=5300

Học Tốt ! #Moon#

a) 12 x 53 + 53 x 172 - 53 x 84

= 53 x ( 12 + 172 - 84 )

= 53 x 100

= 5300

b) 35 x 34 + 35 x 95 + 65 x 75 + 65 x 54

= ( 35 x 34 + 35 x 95 ) + ( 65 x 75 + 65 x 54 )

= 35 x ( 34 + 95 ) + 65 x ( 75 + 54 )

= 35 x 129 + 65 x 129

= ( 35 + 65 ) x 129

= 100 x 129

= 12900

c) 86 x 7676 - 8686 x 76

= 86 x 76 x 101 - 86 x 101 x 76

= 0

d) 6969 x 45 - 4545 x 59

= 69 x 101 x 45 - 45 x 101 x 59

= 45 x 101 x ( 69 - 59 )

= 4545 x 10

= 45450

e) 351 x 67 + 351 x 16 + 649 x 83

= 351 x ( 67 + 16 ) + 649 x 83

= 351 x 83 + 649 x 83

= ( 351 + 649 ) x 83

= 1000 x 83

= 83000 

f) 42 x 53 + 47 x 156 - 47 x 114

= 42 x 53 + 47 x ( 156 - 114 )

= 42 x 53 + 47 x 42

= 42 x ( 53 + 47 )

= 42 x 100

= 4200

g) 3851 : 500 + 1149 : 500

= ( 3851 + 1149 ) : 500 

= 5000 : 500

= 10

h) 4783 : 300 - 1783 : 300

= ( 4783 - 1783 ) : 300

= 3000 : 300

= 10 

câu cuối hơi sai nên bạn gửi lại câu đó nha

a) 60 000

b) 5 700

c) 5 00

d) 1/21

e) 8 160

k nha

60 x 2=120

nha ban

chuc ban hoc gioi

60 x 2 = 120

60 * 2 = 120

39 x 47 + 53 x 172 - 53 x 84 

= 53 x (172 - 84) + (39 x 47)

= 53 x 88 + 39 x 47 

= 4664 + 1833

= 6497

=6497

39 x 47 + 53 x 172 - 53 x 84

= 1833 + 53 x ( 172 - 84 )

= 1833 + 53 x  88

= 1833 +   4664

=    6497

( Pạn nào thấy đúng thì ủng hộ nha!!! )

12 x 53 + 53 x 17 - 53 x 84

= 53 x ( 12 + 17 - 84 )

= 53 x - 29

= -2915

53.(12+17-84)=-2915

53 . ( 12 + 17 - 84 ) = 53 . ( -55) . Lưu ý dấu chấm là dấu nhân nhé

\(2\times53+53\times172-53\times74\)

\(=\) \(53\times(2+172-74)\)

\(=\) \(53\times100\)

\(=\) \(5300\)

2x53+53x172-53x74

=53x(2+172-74)

=53x100

=5300

\(9,=\left(5+2x\right)^3\\ 10,=\left(y+4\right)^3\\ 11,=\left(2x-y\right)\left(4x^2+2xy+y^2\right)\\ 12,=\left(x+5y\right)\left(x^2-5xy+25y^2\right)\)