3, 4 , 5 repede!!!!! dau coroana!!!!!!!

1. D=1326
S=986
descazut= 1326-986=340
2. 2639+1316= 3955
4508+3006= 7514
9126-5208= 3918
2401+1516= 3917
3. a+1512= 3204
a= 3204-1512
a=1692