CHRONO

10 s.

Calculer des expressions comportant des parenthèses.

CHRONO

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