a﴿ 213 = 200 + 10 + 3 = 2.100 + 10 + 3 = 2.10^ 2 + 10^ 1 + 3

b﴿ 421 = 400 + 20 + 1 = 4.100 + 2.10 + 1 = 4.10^ 2+ 2.10^ 1 + 1

c﴿ 2009 = 2000 + 9 = 2 . 1000 + 9 = 2.10 ^3 + 9

d﴿ abc = a.100 + b.10 + c = a.10^ 2 + b.10^ 1 + c

e﴿ abcde = a.10000 + b.1000 + c.100 + d.10 + e = a.10^ 4+ b.10^ 3+ c.10 ^2+ d.10^ 1 + e

a﴿ 213 = 200 + 10 + 3 = 2.100 + 10 + 3 = 2.10 2 + 10 1 + 3

b﴿ 421 = 400 + 20 + 1 = 4.100 + 2.10 + 1 = 4.10 2+ 2.10 1 + 1

c﴿ 2009 = 2000 + 9 = 2 . 1000 + 9 = 2.10 3 + 9

d﴿ abc = a.100 + b.10 + c = a.10 2 + b.10 1 + c

e﴿ abcde = a.10000 + b.1000 + c.100 + d.10 + e = a.10 4+ b.10 3+ c.10 2+ d.10 1 + e

\(2013=2.1000+10+3=2.10^3+1.10^1+3.10^0\)

\(20112013=2.10000000+100000+10000+2.1000+10+3\)

\(=2.10^7+10^5+10^4+2.10^3+10^1+3.10^0\)

2013 = 2 x 1000 + 10 + 3 = 2 x 10^3 + 1 . 10^1 + 3 . 10^0

20112013 = 2 x 10000000 + 100000 + 2 x 1000 + 10 + 3 =  2 x 10^7 + 10^5 + 10^4 + 2 x 10^3 + 10^1 + 3 x 10^0

ok nhé với lại 10^2 là 10 mũ 2 nhé =>

\(213=\)\(2.10^2\)   \(+1.10+3.10^0\)

\(421=4.10^2+2.10+1.10^0\) 

\(1256=1.10^3+2.10^2+1.10^0\) 

\(2006=2.10^3+0.10^2+0.10+6.10^0\) 

abc = a . 10 ^2 + b .10 + c .10 ^ 0

abcde = a.10 ^ 4 + b.10^3 + c.10^ 2+ d .10 + e . 10 ^ 0

k cho mk nha

a)  a b c =   a . 100   +   b . 100   +   c . 1   =   a . 10 2   + b .   10 1 +   c . 10 0

b)  a b c d ¯ =   a . 1000   +   b . 100   +   c . 10   +   d   =   a . 10 3   +   b . 10 2   +   c . 10 1   +   d . 10 0

a)  538 = 5 . 100 + 3 . 10 + 8 . 1 = 5 . 10 2 + 3 . 10 1 + 8 . 10 0 .

b)  8609 = 8 . 1000 + 6 . 100 + 9 . 1 = 8 . 10 3 + 6 . 10 2 + 9 . 10 0 .

a)  a . 10 2 + b . 10 0

b)  a . 10 3 + b . 10 1 + c . 10 0

a)  1 . 10 2 + 2 . 10 1 + 6 . 10 0

b)  1 . 10 4 + 6 . 10 2 + 8 . 10 0

\(1024=2^{10}\)