CHRONO

10 s.

Calculer des compléments à la dizaine supérieure.

CHRONO

0 s.
150 = 146 +
30 = 23 +
570 = 569 +
500 = 500 +
300 = 300 +
210 = 205 +
840 = 838 +
270 = 261 +
70 = 68 +
420 = 415 +
420 = 413 +
750 = 748 +
730 = 728 +
790 = 784 +
630 = 626 +
910 = 907 +
200 = 199 +
320 = 317 +
870 = 866 +
460 = 454 +