213 = 2.10² + 1.10¹ + 3.10⁰

421 = 4.10² + 2.10¹ + 1.10⁰

2009 = 2.10³ + 0.10² + 0.10¹ + 9.10⁰

abc = a.10² + b.10¹ + c.10⁰

abcde = a.10⁴ + b.10³ + c.10² + d.10¹ + e.10⁰

\(213=2×10^2+1×10^1+3×10^0\)

\(421=4×10^2+2×10^1+1×10^0\)

\(2009=2×10^3+0×10^2+0×10^1+9×10^0\)

abc=a×10^2+b×10^1+c×10^0

abcde=a×10^4+b×10^3+c×10^2+d×10^1+e×10^0

\(234=2\cdot10^2+3\cdot10^1+4\cdot10^0\)

\(2056=2\cdot10^3+5\cdot10^1+6\cdot10^0\)

\(2670=2\cdot10^3+6\cdot10^2+7\cdot10^1\)

895 = 8.100 + 9.10 + 5.1 = 8. 102 + 9.101 + 5.100

abc= a.100 + b.10 + c.1 = a. 102 + b.101 + c.100

thiệt hả giờ mình mới biết đó hậu

a) 213 = 2 . 10² + 1 . 10¹ + 3 . 10⁰

b) 1256 = 1 . 10³ + 2 . 10² + 5 . 10¹ + 6 . 10⁰

c) abc = a . 10² + b . 10¹ + c . 10⁰

e)abcde = a . 10⁴ + b . 10³ + c . 10² + d . 10¹ + e . 10⁰

3456= 3^1000+4^100+5^10+6

895 = 8.10² + 9.10¹ + 5.10⁰

abc = a.10² + b.10¹ + c.10⁰

Khi nào rảnh vào kênh H-EDITOR xem vid nha bạn!!! Thanks!

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