CÁLCULO MENTAL 2.º - NIVEL 16

Calcula mentalmente :
110 + 90 = ____________________
260 + 40 = ____________________
940 + 20 = ____________________
520 + 80 = ____________________
630 + 70 = ____________________
350 + 10 = ____________________

Calcula mentalmente :
480 + 20 = ____________________
350 + 50 = ____________________
660 + 30 = ____________________
840 + 60 = ____________________
770 + 30 = ____________________
540 + 50 = ____________________

Calcula mentalmente :
106 + 4 = ____________________
325 + 5 = ____________________
873 + 7 = ____________________
672 + 8 = ____________________
441 + 9 = ____________________
545 + 5 = ____________________

Calcula mentalmente :
819 + 1 = ____________________
283 + 7 = ____________________
368 + 2 = ____________________
534 + 6 = ____________________
757 + 3 = ____________________
981 + 9 = ____________________