Question

Salut Brainly! Afla suma tuturor numerelor care impartite la 9 dau catul egal cu restul

Va rog ajutor! an nou fericit

Answer 1

x:9=c egal cu r
x=10....=> 10:9=1 rest 1.....=>10=9*1+1
x=20....=> 20:9=2 rest 2.....=>20=9*2+2
x=30....=> 30:9=3 rest 3.....=>30=9*3+3
x=40....=> 40:9=4 rest 4.....=>40=9*4+4
x=50....=> 50:9=5 rest 5
x=60....=> 60:9=6 rest 6
x=70....=> 70:9=7 rest 7
x=80....=> 80:9=8 rest 8

10+20+30+40+50+60+70+80=360