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

trieu dang trả lời đúng rùi cho bạn ấy 1 cái đúng nhé

- a. 2.31.12+4.6.42+8.27.3

= 2.12.31 + 2.2.6.42 + 2.4.3.27

= (2.12).31 + (2.2.6).42 + (2.4.3).27

= 24.31 + 24.42 + 24.27

= 24. (31 + 42 + 27 )

= [ Kết quả cậu tự tính nhé ]

- b. 36.28+36.82+64.69+64.41

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

= 36.100 + 64.110

= 3600 + 6440

= [ kết quả cậu tự tính ]

=> [ k for me ] :)) Mơn :3

2.31.12+4.6.42+8.27.3

=24.31+24.42+24.27

=24.(31+42+27)

=24.100

=2400

36.28+36.82+64.69+64.41

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

=36.100+64.100

=(36+64).100

=100.100

=10000

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+82)+64.(69+41)

 =36.110+64.110

 =110.(36+64)

 =110.100

 =11000

a/2.31.12+4.6.42+8.27.3

=744+1008+648

=1752+648

=2400

b/36.28+36.82+65.69+64.41

=1008+2952+3835+2624

=3960+6459

=10419

\(=144+1008+648=1800\)

\(=9\cdot8\left(2+14+9\right)=9\cdot8\cdot20=1800\)

\(2\cdot3\cdot12+4\cdot6\cdot42+8\cdot27\cdot3\\=(2\cdot12)\cdot3+(4\cdot6)\cdot42+(8\cdot3)\cdot27\\=24\cdot3+24\cdot42+24\cdot27\\=24\cdot(3+42+27)\\=24\cdot(45+27)\\=24\cdot72\\=1728\)

#\(Toru\)

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

_HT_

2.31.12+4.6.42+8.27.3

=24.31+24.42+27.24

=24.(31+42+27)

=24.100

=2400

2.31.12+4.6.42+8.27.3 = 24x31+24x42+24x27=24x(31+42+27)=24x100=2400 nha Dương Ngọc Phuong Linh

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