Question

tính ( ghi rõ các bước )

89 x 23 - 89 x 17 + 89 x 4

Answer 1

= 89 x ( 23 - 17 + 4 )

= 89 x 10

= 890

Answer 2

=  89.(23 - 17 + 4)

= 89.10

= 890

Answer 3

`89 xx 23 - 89 xx 17 + 89 xx 4`

`= 89 xx (23 - 17 + 4)`

`= 89 xx (-2)`

`= -178`

Answer 4

= 89. ( 23 - 17+ 4)

= 89. 10

= 890

Answer 5

= 89 x ( 23 - 17 + 4 )

= 89 x 10

= 890

Answer 6

Bổ sung:

`89 xx 23 - 89 xx 17 + 89 xx 4`

`= 89 xx (23 - 17 + 4)`

`= 89 xx 10`

`= 890`