CÁLCULO MENTAL 2.º - NIVEL 10

Calcula mentalmente :
100 + 600 = ____________________
400 + 200 = ____________________
500 + 300 = ____________________
300 + 400 = ____________________
700 + 100 = ____________________
600 + 300 = ____________________

Calcula mentalmente :
200 + 600 = ____________________
100 + 100 = ____________________
400 + 500 = ____________________
200 + 700 = ____________________
500 + 200 = ____________________
100 + 800 = ____________________

400 + 6 = 406
300 + 9 = 309
500 + 4 = 504
500 + 7 = 507
200 + 1 = 201
400 + ____________________ = 40 3

Calcula mentalmente :
300 + 5 = ____________________
200 + 7 = ____________________
100 + 2 = ____________________
400 + 3 = ____________________
300 + 8 = ____________________
500 + 0 = ____________________