nham đe rui phương 

chia làm 2 phần: 
36x28+36x82 
+ 
64x69+69x41 

= 
36 x (28+82) 
+ 
69 x (64+41) 

= 
36 x 110 
+ 
69 x 105 

= 
(36 x 100) + (36 x 10) 
+ 
(69 x 100) + (69 x 5) 

= 
3600 + 360 
+ 
6900 + 345 

= 
3960 
+ 
7245 

đáp số: 
11205

\(36.28+36.82+64.69+64.41\)

\(=36\left(28+82\right)+64\left(69+41\right)\)

\(=36.110+64.110\)

\(=110\left(36+64\right)\)

\(=110.100=11000\)

=36x(28+82)+64x(69+41)

=36x110+64x110

=110x(36+64)

110x100

=11000

36x28+36x82+64x69+64x41

=36x(28+82)+64x(69+41)

=36x110+64x110

=110x(36+64)

=110x100

=11 000

= 36 x ( 28 + 82 ) + 64 x ( 69 + 41 )

= 36 x 110 + 64 x 110

= ( 36 + 64 ) x 110

= 100 x 110

11000

mik đầu tiên nhé bạn !

a) 2.31.12+4.6.42+8.27.3

=24.31+24.42+24.27

=24.(31+42+27)

=24.100

=2400

b) 36.28+36.82+64.69+64.41

=36.(28+82)+64.(69+41)

=36.110+64.110

=110.(36+64)

=110.100

=11000

a) 2 . 31 . 12 + 4 . 6 . 42 + 8 . 27 . 3

= 24 . 31 + 24 . 42 + 24 . 27

= 24 . (31 + 42 + 27)

= 24 . 100

= 2400

b) 36 . 28 + 36 . 82 + 64 . 69 + 64 . 41

= 36 . (28 + 82) + 64 . (69 + 41)

= 36 . 110 + 64 . 110

= (36 + 64) . 110

= 100 . 110

= 11000

a) 2400

b)11000

a) 2.31.12+4.6.42+8.27.3

=24.31+24.42+24.27

=24.(31+42+27)

=24.100

=2400

b) 36.28+36.82+64.69+64.41

=36.(28+82)+64.(69+41)

=36.110+64.110

=110.(36+64)

=110.100

=11000

a = 24 . 31 + 24 . 42 + 24 . 27

= 24 . 100

= 2400

b = 36 . ( 28 + 82 ) + 64 . ( 69 + 41 )

= 36 . 110 + 64 . 110

= 110 . ( 36 + 64 )

= 100 . 100 = 11000

a = 24 . 31 + 24 . 42 + 24 . 27

= 24 . 100 

= 2400

b = 36 . ( 28 + 82 ) + 64 . ( 69 + 41 )

= 36 . 110 + 64 . 110

= 110 . ( 36 + 64 )

= 110 . 100 = 11000

a) A = 2.31.12 + 4.6.42 + 8.27.3

= 24.31 + 24.42 + 24.27

= 24.(31 + 42 + 27)

= 24.100 = 2400

b) B = 36.28 + 36.82 + 64.69 + 64.41

= 36.(28 + 82) + 64.(69 + 41)

= 36.110 + 64.110

= 110.(36 + 64)

= 110.100 

= 11000

a,  2 . 31 . 12 + 4 . 6 . 42 + 8 . 27 . 3 

= 24 . 31 + 24 . 42 + 24 . 27

= 24 . ( 31 + 42 + 27 )

=  24 . 100 = 2400

b, 36 . 28 + 36 . 82 + 64 . 69 + 64 . 41

= 36 . ( 28 + 82 ) + 64 . ( 69 + 41 ) 

= 36 . 110 +  64 . 110 

= 110 . ( 36 + 64 ) 

= 110 . 100 = 11000 

=36x(28+82)+64x(69+41)

=36x110+64x110

=110x(26+64)

=110x100

=11000

**** bn hiền

36x28+36x82+64x69+64x41

=36x(28+82)+64x(69+41)

=36x110+64x110

=110x(36+64)

=110x100

=11000

36 x ( 28 + 82 ) + 64 x ( 69 + 41 ) = ( 36 + 64 ) x  (28 + 82)  = 100 x 110 = 11000

   36 * 28 + 36 * 82 + 64 * 69 + 64 * 41

= 36 * ( 28 + 82 ) + 64 * ( 69 + 41 )

= 36 * 110 + 64 * 110

= 110 * ( 36 + 64 )

= 110 * 100

= 11000

=11000

a) 2.31.12+4.6.42+8.27.3

= [(2.12).31]+[(4.6).42]+[(8.3).27]

= 24.31+24.42+24.27

= 24.(31+42+27)

= 24.100

= 2400

b) 36.28+36.82+64.69+64.41

= (36.28+36.82)+(64.69+64.41)

= [36.(28+82)]+[64.(69+41]

= 36.110+54.110

= 110.(36+54)

= 110.90

= 200

a) 2 . 31 .12 + 4 .6 .42 + 8 .27 .3

= 2 .12 .31 + 4 . 6 .42 + 8 . 3 .27

= 24 . 12 + 24 . 42 + 24 . 27

= 24 . ( 12 + 42 + 27 )

= 24 .  86

= 2064

b) 36 . 28 + 36 . 82 + 64 . 69 + 64 . 41

= 36. ( 28 + 82 ) + 64 . ( 69 + 41 )

= 36 . 110 + 64 . 110

=  ( 36 + 64 ) . 110

= 100 . 110

= 11000

tính nhanh 

a) 2 . 31 . 12 + 4 . 6 . 42 + 8 . 27 . 3

b) 36 . 28 + 36 . 82 + 64 . 69 + 64 . 41

a) 2.31.12+4.6.42+8.27.3

= [(2.12).31]+[(4.6).42]+[(8.3).27]

= 24.31+24.42+24.27

= 24.(31+42+27)

= 24.100

= 2400

b) 36.28+36.82+64.69+64.41

= (36.28+36.82)+(64.69+64.41)

= [36.(28+82)]+[64.(69+41]

= 36.110+54.110

= 110.(36+54)

= 110.90

= 200