CÁLCULO MENTAL 2.º - NIVEL 7

Calcula mentalmente :
71 + 19 = ____________________
33 + 47 = ____________________
52 + 38 = ____________________
47 + 23 = ____________________

Calcula mentalmente :
29 + 51 = ____________________
65 + 15 = ____________________
26 + 14 = ____________________
48 + 32 = ____________________

Calcula mentalmente :
63 + 27 = ____________________
35 + 25 = ____________________
59 + 21 = ____________________
14 + 56 = ____________________