CHRONO

10 s.

Calculer de 20 en 20, de 50 en 50.

CHRONO

0 s.
377 = 20 +
354 + 20 =
389 + 50 =
414 = 50 +
220 = 50 +
295 + 20 =
333 = 20 +
248 + 20 =
275 = 20 +
286 + 20 =
104 + 50 =
336 + 20 =
341 + 20 =
437 + 50 =
145 = 20 +
248 = 20 +
419 = 50 +
263 + 20 =
283 + 50 =
270 + 20 =