CHRONO

10 s.

Calculer des compléments à la dizaine supérieure.

CHRONO

0 s.
40 = 39 +
20 = 13 +
470 = 467 +
640 = 640 +
830 = 822 +
830 = 828 +
820 = 813 +
970 = 965 +
390 = 383 +
410 = 402 +
130 = 130 +
580 = 577 +
310 = 307 +
1000 = 993 +
440 = 434 +
340 = 339 +
400 = 398 +
750 = 750 +
570 = 563 +
450 = 446 +