CÁLCULO MENTAL 2.º - NIVEL 15

Calcula mentalmente :
500 + 130 = ____________________
200 + 240 = ____________________
300 + 450 = ____________________
400 + 260 = ____________________

Calcula mentalmente :
100 + 720 = ____________________
400 + 340 = ____________________
300 + 450 = ____________________
500 + 160 = ____________________

Calcula mentalmente :
200 + 520 = ____________________
100 + 630 = ____________________
200 + 370 = ____________________
600 + 250 = ____________________