= 37 x 2 x 19 - 74 x 19 + 1000

= 74 x 19 - 74 x 19 + 1000

= 1000

= 1000

Love you

27 x 38 - 74 x 19 + 1000

= 27 x ( 2 x 19) - 74 x 19 + 1000

= 74 x 19 - 74 x 19 + 1000

=74 x ( 19 - 19) + 1000

= 74 x 0 + 1000

= 0+ 1000

a 1000

b 48

a)  37 x 38 - 19 x 74 + 1000

= 37x19x2-19x2x37+1000

= 19x2x(37-37)+1000

= 38+1000

= 1038

b) 0,48x500-2,4x40x2

= 0,48x5x100-2,4x40x2

= 2,4x2x50-2,4x2x40

= 2,4x2x(50-40)

= 4,8x10

= 48

a)12166.59259

b)1248528

\(\dfrac{54\times50+49\times100}{37\times38+126\times19}\)

\(=\dfrac{50\times\left(49\times2+54\right)}{38\times\left(63+37\right)}\)

\(=\dfrac{50\times152}{38\times100}\)

\(=\dfrac{25\times2\times4\times38}{38\times25\times4}\)

\(=2\)

Theo đề ra ta có: 37. 38 - 19. 74= 37. 19. 2- 19. 37. 2= 0

\(37.38-19.74\)

\(=37.19.2-19.37.2\)

\(=37.\left(19.2-19.2\right)\)

\(=37.\left(38-38\right)\)

\(=37.0\)

\(=0\)

37.38-19.74

= 37.19.2 - 19. 37.2

= 37.(19.2-19.2)

= 37.0

= 0

=3071

= 37x38+ (37x2)x27 - (37x3)x3

=37x38+37x (2 x 27) - 37 x (3x3)

= 37 x 38 + 37 x 54 - 37x 9

= 37x ( 38+54-9) 

= 37 x 83

= 3071

a,\(37\times38-19\times74+1000\)

\(=37\times2\times19-19\times74+1000\)

\(=19\times\left(37\times2-74\right)+1000\)

\(=19\times0+1000\)

\(=0+1000\)

\(=1000\)

Phần b mai mik làm típ cho nha