Question

(1*2*3*4*...*27*28+20):17=? ​

Answer 1

Răspuns:

(1*1+1*2+1*3+1*4...+1*27+1*28+20):17

=1(1+2+3+4+...+27+28+20):17

=1(28*29:3+20):17

=1 (406+20):17

=1*426:17

=426:17

=25 rest 1

Sper ca te am ajutat :)