Question

Efectuează apoi verifica a)prin adunare 23+62 24+53 46+21 46+32b)prin scadere 52+25 34+43 13+31 54+45c)prin adunare si scădere 16+23 76+11 73+22 83+12

Answer 1

23+62=85 24+53=77 46+21=67 46+32=78
85-62=23 77-53=24 67-21=46 78-32=46

b) 52+25=77 34+43=77 13+31=44 54+45=99
77-25=52 77-43=34 44-31=13 99-45=54

c) 16+23=49 76+11=87 73+22=95 83+12=95
49-23=16 87-11=76 95-22=73 95-12=83
23+16=49 11+76=87 22+73=95 12+83=95