Question

Scrie toate nr nat de două cifre care au suma cifrelor:a)2,b)4,c)6,d)8

Answer 1

$a)11,20.$

$1 + 1 = 2$

$2 + 0 = 2$

$b)13,22,31,40.$

$1 + 3 = 4$

$2 + 2 = 4$

$3 + 1 = 4$

$4 + 0 = 4$

$c)15,24,33,42,51,60.$

$1 + 5 = 6$

$2 + 4 = 6$

$3 + 3 = 6$

$4 + 2 = 6$

$5 + 1 = 6$

$6 + 0 = 6$

$d)17,26,35,44,53,62,71,80.$

$1 + 7 = 8$

$2 + 6 = 8$

$3 + 5 = 8$

$4 + 4 = 8$

$5 + 3 = 8$

$6 + 2 = 8$

$7 + 1 = 8$

$8 + 0 = 8$