1x2x3x4x5x6x7=5040
mik trả lời trc nà
1 x 2 x 3 x 4 x 5 x 6 x 7
= 2 x 3 x 4 x 5 x 6 x 7
= 6 x 4 x 5 x 6 x 7
= 24 x 5 x 6 x 7
= 120 x 6 x 7
= 720 x 7
= 1540
1 x 2 x 3 x 4 x 5 x 6 x 7
= 2 x 3 x 4 x 5 x 6 x 7
= 6 x 4 x 5 x 6 x 7
= 24 x 5 x 6 x 7
= 120 x 6 x 7
= 720 x 7
= 5040
1 . 2 . 3 . 4 . 5 . 6 . 7
= 2 . 3 . 4 . 5 . 6 . 7
= 6 . 4 . 5 . 6 . 7
= 24 . 5 . 6 . 7
= 120 . 6 . 7
= 720 . 7
= 5040
1x2x3x4x5x6x7
=2x3x4x5x6x7
=6x4x5x6x7
=24x5x6x7
=120x6x7
=720x7
=5040