 ลองคิดตามได้นะ...ต้องยกนิ้วให้คนคิด  เยี่ยมจริงๆ  6 d$ J4 h, t' v 1 x 8 + 1 = 9 12 x 8 + 2 = 98- M) V% \5 M. M0 Q5 A2 ~ 123 x 8 + 3 = 987 1234 x 8 + 4 = 9876 12345 x 8 + 5 = 98765 123456 x 8 + 6 = 9876546 ` ?, {! g+ s% C; B0 r- X# V 1234567 x 8 + 7 = 9876543 12345678 x 8 + 8 = 98765432" ^8 R. |. n9 T* V7 u 123456789 x 8 + 9 = 987654321 , _6 K& G- {- e1 g M 1 x 9 + 2 = 11( U. c# n" z! w 12 x 9 + 3 = 111 123 x 9 + 4 = 1111! I- h& c" Y4 y& {& K9 j1 x 1234 x 9 + 5 = 11111 12345 x 9 + 6 = 111111$ v8 y ~, u8 h; y4 z$ U% w1 p; h 123456 x 9 + 7 = 1111111 1234567 x 9 + 8 = 11111111( v) g5 C3 X- P, ? 12345678 x 9 + 9 = 111111111 123456789 x 9 +10= 1111111111 ) p. K" W, _0 v& M; |6 g$ m 9 x 9 + 7 = 88( k+ j% N. r5 x# t6 o) a 98 x 9 + 6 = 888% y1 z3 z3 Z9 r 987 x 9 + 5 = 8888 9876 x 9 + 4 = 88888 98765 x 9 + 3 = 888888 987654 x 9 + 2 = 8888888# `! g( |& S7 G1 R 9876543 x 9 + 1 = 88888888 98765432 x 9 + 0 = 888888888+ l2 R! \6 E9 @' }( d1 T5 Q size]; ?. [6 q* }9 {" q 1 b; M* W1 v2 s2 }% p 1 x 1 = 1! @+ X. D3 u, `/ K, o5 ~* S 11 x 11 = 121 111 x 111 = 12321# h, R* ]4 q' E9 Z2 } 1111 x 1111 = 1234321 11111 x 11111 = 123454321 111111 x 111111 = 12345654321& l w* G" z# |4 S/ T 1111111 x 1111111 = 1234567654321 11111111 x 11111111 = 1234567876543212 f& k% M, L! G/ T y+ \( x 111111111 x 111111111=123456789 87654321 : C) S3 C3 f/ V) H% L& g7 v* p) E3 L 12345679x9=1111111110 o* M- h' L: i1 m. M) V 12345679x18=222222222 12345679x27=333333333 12345679x36=4444444444 n \# ~/ u& l- _( Q5 H 12345679x45=555555555 12345679x54=666666666 12345679x63=777777777 12345679x72=888888888 12345679x81=999999999 . O0 w5 H! u3 f! o! x  # s8 }4 ?& Y) |5 w+ X0 z2 K: J+ x2 u |
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