CÁLCULO MENTAL 2.º - NIVEL 4

Calcula mentalmente :
15 + 2 = ____________________
33 + 6 = ____________________
67 + 1 = ____________________
41 + 8 = ____________________
72 + 7 = ____________________
26 + 2 = ____________________

Calcula mentalmente :
54 + 4 = ____________________
98 + 1 = ____________________
32 + 4 = ____________________
23 + 9 = ____________________
65 + 5 = ____________________
48 + 3 = ____________________

Calcula mentalmente :
74 + 6 = ____________________
86 + 9 = ____________________
59 + 1 = ____________________
36 + 8 = ____________________
15 + 8 = ____________________
86 + 7 = ____________________