CHRONO

40 s.

Calculer de 20 en 20, de 50 en 50.

CHRONO

0 s.
132 = 20 +
336 + 20 =
274 = 20 +
339 = 50 +
318 + 50 =
216 + 50 =
223 = 20 +
288 = 50 +
319 + 20 =
366 + 50 =
137 + 50 =
426 = 50 +
371 + 50 =
197 = 50 +
433 = 20 +
239 + 50 =
271 = 20 +
197 = 20 +
344 = 50 +
287 + 20 =