Question

tính hợp lí:

29. ( 19 -13 ) - 19 . ( 29 - 13)

giúp với đang cần gấp 

Answer 1

29 . ( 19 - 13 ) - 19 . ( 29 - 13 )

= 29 . 19 - 29 . 13 - 19 . 29 - 19 . 23

= 19 . ( 29 - 19 - 23 ) - 29 . 13

= 19 . ( - 13 ) - 29 . 13

= ( -19 ) . 13 - 29 . 13

= 13 . [ ( -19 ) - 29 ]

= 13 . ( -48 )

= -624

Answer 2

29 . ( 19 - 13 ) - 19 . ( 29 - 13 )

= 29 . 19 - 13 - 19 . 29 - 13 

= 29 . ( 19 - 19 ) . ( 13 - 13 ) 

= 29      .       0          .      0

= 0 

Answer 3

= 29.19 - 29.13 - 19.29 - 19.13

= (29.19 - 19.29) - (29.13 - 19.13)

= 0 - 13.(29 - 19)

= 0 - 13. 10

= 0 - 130

= -130

Answer 4

29 . 19 -29 .13 -19 .29 -19 .13 

=(29 .19 -19 .29) -29 .13 -19 .13

=                   0-13 . (29-19)

=                     0-13 .10

=                         0-130

 =                      - 130

Answer 5

= 29.19 - 29.13 - 19.29 - 19.13

= (29.19 - 19.29) - (29.13 - 19.13)

= 0 - 13.(29 - 19) = 0 - 13. 10

= 0 - 130 = -130

Answer 6

29.(19-13)-19.(29-13)

=29.19-29.13-19.29-19.13+19.13

=29.19-29.19-19.13+19.13

=13.(-29+19)

=13.(-10)

=-130

Answer 7

= 29.19 - 29.13 - 19.29 - 19.13

= (29.19 - 19.29) - (29.13 - 19.13)

= 0 - 13.(29 - 19) = 0 - 13. 10

= 0 - 130 = -130

Đọc tiếp...

Answer 8

130 nha

Answer 9

= \(29\cdot19-29\cdot13-19\cdot29+19\cdot13\)

= \(13\left(-29+19\right)\)

= \(13\cdot\left(-10\right)\)

= \(-130\)

Answer 10

tính hợp lí:

29. ( 19 -13 ) - 19 . ( 29 - 13)

=29.19-29.13-19.29-19.13

=(29.19-19.29)-29.13-19.13

=0-13(29-19)

=0-13.10

=0-130=-130