CHRONO

10 s.

Calculer de 20 en 20, de 50 en 50.

CHRONO

0 s.
265 + 20 =
143 + 20 =
100 + 20 =
345 = 20 +
414 + 20 =
201 + 50 =
375 = 50 +
324 = 20 +
184 + 20 =
367 = 50 +
409 + 20 =
419 = 20 +
337 = 20 +
371 + 50 =
342 = 20 +
202 + 50 =
128 + 50 =
397 + 20 =
403 = 20 +
436 = 50 +