CHRONO

45 s.

Calculer des expressions comportant des parenthèses.

CHRONO

0 s.
(9 x 7) - 5 =
(8 x 7) - 9 =
8 x (7 - 3) =
8 + (9 x 8) =
(9 - 2) - 7 =
(3 x 5) + 8 =
6 - (6 - 3) =
(8 + 9) - 4 =
(5 x 7) + 5 =
(6 x 6) - 8 =
8 x (8 - 7) =
7 - (4 - 1) =
(8 + 7) - 4 =
(7 x 7) - 4 =
(5 x 4) + 4 =
(4 x 3) + 8 =
(5 - 3) x 8 =
7 - (5 - 1) =
6 - (9 - 7) =
(1 x 9) - 1 =