Calcul Mental
25/08/2025
MiCetF
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10 s.
Ajouter ou soustraire des dizaines entières.
0 s.
90 - 60 =
90 - 20 =
20 + 40 =
80 = 80 +
80 = 60 +
20 + 30 =
60 + 10 =
60 = 30 +
60 = 50 +
40 - 40 =
40 + 50 =
20 + 70 =
10 + 70 =
70 = 50 +
40 + 20 =
60 = 60 +
30 + 10 =
50 = 40 +
10 = 10 +
90 = 80 +
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