CHRONO

10 s.

Calculer de 20 en 20, de 50 en 50.

CHRONO

0 s.
197 + 50 =
134 + 20 =
434 + 50 =
165 = 50 +
365 = 20 +
373 + 20 =
405 + 50 =
232 = 50 +
253 + 50 =
125 = 50 +
407 = 20 +
252 + 20 =
410 + 50 =
329 = 20 +
295 = 20 +
428 = 50 +
291 = 50 +
228 + 20 =
431 + 50 =
340 + 50 =