CHRONO

10 s.

Calculer des compléments à la dizaine supérieure.

CHRONO

0 s.
370 = 367 +
810 = 807 +
530 = 523 +
400 = 391 +
680 = 679 +
540 = 536 +
80 = 80 +
240 = 240 +
350 = 343 +
770 = 762 +
970 = 968 +
30 = 25 +
580 = 572 +
150 = 141 +
630 = 624 +
630 = 629 +
290 = 285 +
360 = 351 +
510 = 504 +
90 = 85 +