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Ajuuuutor! Exercitiul 4

Ajuuuutor Exercitiul 4 class=

Răspuns :

A) 17x99=17x(98+1)=17x98+17x1=1666+17=1683
b) 345x101= 345x(100+1)=345x100+345x1= 345000+345=345345
c) 57x11=57x(10+1)=57x10+57x1= 570+57=627
d) 97x999=97x(998+1)=97x998+97x1=96806+97=96903