\(=390\)

Đề:45+27+65+46+35+73+54+18+27

=(27+73)+(65+35)+(54+46)+(45+27+18)

=100+100+100+90

=390

= ( 3,54 x 73  +  3,54 x 27) + ( 0,23 x 46+ 0,77 x 46)

= 3,54 x ( 73 + 27 ) + 46x ( 0,23 + 0,77)

= 3,54 x 100 + 46 x  1

= 354 + 46 

= 400

3,527 + 65 x 73 + 65 x 27 + 3,573

= 3,527 + 65 x ( 73 + 27 ) + 3,573

= 3,527 + 65 x 100 + 3,573

= 3,527 + 6500 + 3,573

= 6507,1

\(3,527+65\times73+65\times27+3,573\\ =\left(3,527+3,573\right)+65\times\left(73+27\right)\\ =7,1+65\times100\\ =7,1+6500\\ =6507,1\)

17 + 46 - \(x\) = 27

 63       -  \(x\)  =27

               \(x\)  = 63 - 27

              \(x\)  = 36

25 + \(x\) = 73 - 19

25 + \(x\) = 54

       \(x\)   = 54 - 25

       \(x\)   = 29

A = 78 x 31 + 78 x 24 + 78 x 17 + 22 x 72

A = 78 x ( 31 + 24 + 17 ) + 22 x 72

A = 78 x 72 + 22 x 72

A = 72 x ( 78 + 22 ) 

A = 72 x 100

A = 7200

C = 53 x 39 + 47 x 39 - 53 x 21 - 47 x 21

C = 39 x ( 53 + 47 ) - 21 x ( 53 - 47 )

C = 39 x 100 - 21 x 6

C = 3900 - 126

C = 3774

ko pc tui thua bn 1 lp 

Kết quả là:

 35 x (27 + 73) = 3500

  Đáp số: 3500

nhân cho 100

\(\left(154+46\right)\times\left(73+27\right)\)

\(=200\times100\)

\(=20000\)

nha

(154+46)x(73+27)

=200x100

=20000

3, 54 x 73 + 0,23 x 25 + 3,54 x 27 + 0,17 x 25

= 3,54 x 73 + 3,54 x 27 + 0,23 x 25 + 0,17 x 25

= 3,54 x(73+27) + 25 x (0,23+0,17)

= 3,54 x 100 + 25 x 0,4

= 3,54 x 100 + 10

= 35,4 x 10 + 10

= 10 x (35,4+1)

= 10 x 36,4

= 364

364 ban a