Question

Tính hợp lí:

45x 48 - 90 x 24 + 1999

Answer 1

45 x 48 - 90 x 24 + 1999 = 45 x 48 - 45 x 2  x 24 + 1999

                                        = 45 x 48 - 45 x 48 + 1999

                                        = 0 + 1999

                                        = 1999

Chúc bạn hok tốt nha!

Answer 2

45 x 48 - 90 x 24 + 1999

= 45 x 48 - 45 x 48 + 1999

= 45 x ( 48 - 48 ) + 1999

= 45 x 0 + 1999

= 1999

Answer 3

1999do la dap an

Answer 4

\(45.48-90.24+1999\)

\(=45.48-\left(45+45\right).24+1999\)

\(45.48-45.24-45.24+1999\)

\(=0+1999\)

=1999

Answer 5

45 x 48 - 90 x 24 + 1999

= 45 x 48 - 45 x 48 + 1999

= 45 x ( 48 - 48 ) + 1999

= 45 x 0 + 1999

= 1999