Bonjour,

2/3+5/6×18/10-2/3:4/12

= 2/3 + 90/60 - 2/3 x 12/4

= 2/3 + (30 x 3) / (30 x 2) - 24/12

= 2/3 + 3/2 - (12 x 2) / (12 x 1)

= 2/3 + 3/2 - 2

= (2 x 2) / (3 x 2) + (3 x 3) / (2 x 3) - (2 x 6) / (1 x 6)

= 4/6 + 9/6 - 12/6

= 1/6.

bonjour

2/3 + 5/6 x 18/10 - 2/3  : 4/12

= 2/3 + 90 /60 - 2 /3 x 12/4

= 2/3 + 90/60 - 24/12

=   40/ 60 + 90 /60 - 120/60

=  -  10 /60

=  -  1/6