10 + 10 + 12 + 12 + 13 + 13 + 11
= 10 x 2 + 12 x 2 + 13 x 2 + 11
= 20 + 24 + 26 + 11
= 81
\(10+10+12+12+13+13+11\)
\(=10^2+12^2+13^2+11\)
\(=100+144+169+11\)
\(=424\)
\(10+10+12+12+13+13+11\)
\(=10\cdot2+12\cdot2+13\cdot2+11\)
\(=2\left(10+12+13\right)+11\)
\(=2\cdot35+11\)
\(=70+11\)
\(=81\)
10 + 10 + 12 + 12 + 13 + 13 +11 = 424
kick mik nha
\(10+10+12+12+11\)\(1\)
\(=10\times2+12\times2\)\(+11\)
\(=20+24+11\)
\(=44+11\)
\(=55\)
VICTOR_Nobita Kun sai rồi 10 x 10 mới = 10 ^ 2 mà , mà đây là 10 + 10
10 + 10 + 12 + 12 + 13 + 13 + 11
= 10 x 2 + 12 x 2 + 13 x 2 + 11
= 2 x ( 10 + 12 + 13 ) + 11
= 2 x 35 + 11
= 70 x 11
= 81
10 + 10 + 12 + 12 + 13 + 13 + 11
= 10 ( 1+ 1 ) + 12 ( 1+ 1) + 13 (1+ 1) +11
= (10+ 12 +13 ) (1+1) +11
= 35.2 +11 = 70 +11
=81
