18 + 40 =, 60 - 23 =, 18 + 24 =, 30 + 35 =, 22 + 38 =, 45 + 15 =, 59 - 17 =, 55 - 32 =, 37 - 22 =, 18 + 50 =, 55 + 5 =, 60 - 43 =, 55 - 19 =.

T1_U2_L1_Les nombres de 20-60

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