a)73.(74-72)+72.(73-74)

=74.(73-73)+(72-72)

=74.0+0

=74

b)37.(25+27)-27.(37+25)

=37.52-27.62

=1924-1674

=250

tick cho mk nha bạn

a 475 - ( 75 + 36 ) = 475 - 75 - 36

= 400 - 36

= 364

b 821 - 73 - 27 - 21

= ( 821 - 21 ) - ( 73 + 27 )

= 800 - 100

= 700

a ) 475 - ( 75 + 36 )

= 475 - ( 75 + 35 ) - 1

= ( 475 - 1 ) - 100

= 474 - 100 = 374

b ) 821 - 73 - 27 - 21

= ( 821 - 21 ) - ( 73 + 27 )

= 800 - 100

= 700

c ) \(\frac{37}{25}\div\frac{5}{4}\div\frac{74}{25}\)

\(=\frac{37\cdot2\cdot2\cdot25}{25\cdot5\cdot37\cdot2}\)

\(=\frac{2}{5}\)

c 37/25:5/4:74/25

=37/25 x 4/5 x 25/74

=37 x 4 x 25/5 x 25 x 74

=2/5.

d 6/11 : 4/3  + 5/11 

=(6/11:5/11):(4/3:4/3)

=6/5:1

=6/5

= ( -25) x 1 +72 x (-25) + (-25) x27

= (- 25) x ( 1 + 72 + 27 )

= (-25) x 100

=-2500 

b 

c 37 x ( 25 + 37 ) - 27 x ( 37 + 25 )

= 37 x 25 + 37 x 37 -27x37 -27x25

= ( 37 x25 -27x25 )+(37x37-27+37)

=25 x ( 37 -27 ) + 37 x (37 - 27)

= 25 x10 + 37x10 

= 250 + 370 

= 770

a) =-25.( 1+72+27)

=-25.100= - 2500

b) = -36.45 + (-36) . 15 - (-36) . 40

= - 36. ( 45+15-40)

= -36 . 20= -720

c) =37.62 - 27 .62

= 62. ( 37 - 27 )

= 62 . 10 

= 620

a: \(=13\cdot55-13\cdot29-55\cdot13+55\cdot29\)

\(=-13\cdot29+55\cdot29=29\cdot42=1218\)

b: \(=37\cdot27+37\cdot25-27\cdot37-27\cdot25\)

\(=27\cdot12=324\)

c: \(=-25\left(28+72\right)=-25\cdot100=-2500\)

A<B

A=B