11 x 10 + 89 x 5 + 89 x 3 + 89 x 2
= 110 + 89 x ( 5 + 3 + 2)
= 110 + 89 x 10
= 110 + 890
= 1000
a ) 11 x 10 + 89 x 5 + 89 x 3 + 89 x 2
= 11 x 10 + 89 x ( 5 + 3 + 2 )
= 11 x 10 + 89 x 10
= ( 11 + 89 ) x 10
= 100 x 10
= 1000
11 x 10 + 89 x 5 + 89 x 3 + 89 x 2
= 110 + 89 x ( 5 + 3 + 2 )
= 110 + 89 x 10
= 110 + 890
= 1000
11 x 10 + 89 x 5 + 89 x 3 + 89 x 2
= 110 + 89 x ( 5 + 3 + 2 )
= 110 + 89 x 10
= 110 + 890
= 1000
11 x 10 + 89 x 5 + 89 x 3 + 89 x 2
= 110 + 89 x ( 5 + 3 + 2 )
= 110 + 89 x 10
= 110 + 890
= 1000
Tham khảo nha !
Chúc bạn học giỏi !
^^
= 110 + 89 . ( 5 + 3 + 2 )
= 110 + 89 . 10
= 110 + 890
= 1000