Question

Efectueaza calculele urmatoare,utilizand propietatea de distrivutivtatea a inmultirii fata de adunare si fata de scadere model 37×11=37×(10+1)=37×1=370+37=407
37×9=37×(10-1)=37×10-37×1=370-37=333
A 17×99 B 345×101 C 57×11 D 97×999. RAPID VA ROG

Answer 1

17*(90+9)= 17*90+17*9=1530+153=1683
345*(100+1)=345*100+345*1=34500+345=34845
97*(900+99)=97*900+97*99=87300+9603=96903
57*11=57*(10+1)= 57*10+57*1=570+57=627

Answer 2

7*(90+9)= 17*90+17*9=1530+153=1683
345*(100+1)=345*100+345*1=34500+345=34845
97*(900+99)=97*900+97*99=87300+9603=96903
57*11=57*(10+1)= 57*10+57*1=570+57=627