CHRONO

10 s.

Calculer des compléments à la dizaine supérieure.

CHRONO

0 s.
540 = 535 +
950 = 943 +
320 = 317 +
820 = 812 +
560 = 554 +
710 = 709 +
50 = 43 +
170 = 170 +
500 = 497 +
570 = 567 +
30 = 23 +
700 = 693 +
280 = 274 +
330 = 329 +
370 = 367 +
340 = 332 +
240 = 234 +
490 = 486 +
300 = 299 +
800 = 794 +