Question

calculeaza suma tututor numerelor naturale de forma: a)aa ; b)aaa ; c)aaaa

Answer 1

A) 11, 22 33 44 55 66 77 88 99
1 +1=2
2+2=4
3+3=6
4+4=8
5+5=10
6+6=12
7+7=14
8+8=16
9+9=18
B) 111, 222,333,444,555,666,777,888,999
1+1+1=3
2+2+2=6
3+3+3=9
4+4+4=12
5+5+5=15
6+6+6=18
7+7+7=21
8+8+8= 24
9+9+9=27
C)1111,2222,3333,4444,5555,6666,7777,8888,9999
1+1+1+1=4
2+2+2+2=8
3+3+3+3=12
4+4+4+4=16
5+5+5+5=20
6+6+6+6=24
7+7+7+7=28
8+8+8+8=32
9+9+9+9=37

Answer 2

aa
1 1+
22+
33+
44+
55+
66+
77+
88+
99=
33+77+121+165+99=110+286+99=386+99=485

aaa
1 1 1+
222+
333+
444+
555+
666+
777+
888+
999=
333+777+1225+1665+999=1100+2890+999=3990+999=4989

aaaa
1 1 1 1+
2222+
3333+
4444+
5555+
6666+
7777+
8888+
9999=
3333+
7777+
12221+
16665+
9999=
10110+
28886+
9999=
38996+
9999=
38995