1 + 3 + 5 + 7 + 6 + 9
= 4 + 5 + 7 + 6 + 9
= 9 + 7 + 6 + 9
= 16 + 6 + 9
= 22 + 9
= 31.
1 + 3 + 7 + 5 + 6 + 9
= (1 + 9) + (3 + 7) + 5 + 6
= 10 + 10 + 5 + 6
= 20 + 5 + 6
= 25 + 6
= 31
k cho mk nha
1+3+7+5+6+9
= (1+9) +(7+3)+1+5+5+1
= (1+9) + (7+3)+ ( 5+5) +1*2
= 10+10+10+2
= 32
k cho mình nha
1 + 3 + 5 + 7 + 6 + 9
= 4 + 5 + 7 + 6 + 9
= 9 + 7 + 6 + 9
= 16 + 6 + 9
= 22 + 9
= 31.
TK!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
1 + 3 + 7 + 6 + 9 = 26
nhớ k mình nha
======31
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