Question

9-1-2-4-1x9x9

Answer 1

viết rồi chụp ảnh qua

Answer 2

9 - 1 - 2 - 4 - 1 x 9 x 9

= 81

Answer 3

9 - 1 - 2 - 4 - 1 x 9 x 9

= 9 - ( 1 + 2 + 4 + 1 ) x 9 x 9

= 9 - 8 x 9 x 9

= 1 x 9 x 9 

= 9 x 9

= 81

Answer 4

81

Answer 5

ket qua la 12

Answer 6

81

Answer 7

9-1-2-4-1x9x9

=81-9-1-2-4

= 65

Answer 8

81

Answer 9

64

Answer 10

81

Answer 11

=81

Answer 12

9-1-2-4-1x9x9

=(9-(1+2+4+1))x9x9

=9x9

=81

Answer 13

9 - 1 - 2 - 4 - 1 x 9 x 9

= 9 - ( 1 + 2 + 4 + 1 ) x 9 x 9

= 9 - 8 x 9 x 9

= 1 x 9 x 9 

= 9 x 9

= 81

Answer 14

dạ băng 81 ạ

Answer 15

81

Answer 16

81

Answer 17

9-1-2-4-1x9x9

=81

Answer 18

81