a) 342x2=684
proba 684:2=342
342x7=2394
proba 2394:7=
b)1323x3=3969
proba 3969:3=1232
1323x8=10584
proba 10584:8=1323
c)12x13=156
proba 156:13=12
12x64=768
proba 768:64=12
d)243x122=29646
proba 29646:122=243
243x456=110808
proba 110808:456=243
sper că te am ajutat!!
