\(1111=1000+100+10+1=10^3+10^2+10^1+1\)

\(1247=1000+2\times100+4\times10+7=10^3+2\times10^2+4\times10^1+7\)

\(1543=1000+5\times100+4\times10+3=10^3+5\times10^2+4\times10^1+3\)

\(1794=1000+7\times100+9\times10+4=10^3+7\times10^2+9\times10^1+4\)

\(1876=1000+8\times100+7\times10+6=10^3+8\times10^2+7\times10^1+6\)

\(1008=1000+8=10^3+8\)

\(1080=1000+8\times10=10^3+8\times10^1\)

\(1709=1000+7\times100+9=10^3+7\times10^2+9\)

\(1500=1000+5\times100=10^3+5\times10^2\)

\(1097=1000+9\times10+7=10^3+9\times10^1+7\)

\(20000=2\times10000=2\times10^4\)

\(27000=2\times10000+7\times1000=2\times10^4+7\times10^3\)

\(28700=2\times10000+8\times1000+7\times100\)

\(24004=2\times10000+4\times1000+4=2\times10^4+4\times10^3+4\)

\(26013=2\times10000+6\times1000+1\times10+3=2\times10^4+6\times10^3+10^1+3\)

\(20508=2\times10000+5\times100+8=2\times10^4+5\times10^2+8\)

\(20358=2\times10000+3\times100+5\times10+8=2\times10^4+3\times10^2+5\times10^1+8\)

\(20009=2\times10000+9=2\times10^4+9\)

\(29830=2\times10000+9\times1000+8\times100+3\times10=2\times10^4+9\times10^3+8\times10^2+3\times10^1\)

\(25763=2\times10000+5\times1000+7\times100+6\times10+3=2\times10^4+5\times10^3+7\times10^2+6\times10^1+3\)

1.
a) \(3^4\times3^5\times3^6=3^{4+5+6}=3^{15}\)

b) \(5^2\times5^4\times5^5\times25=5^2\times5^4\times5^5\times5^2=5^{2+4+5+2}=5^{13}\)

c) \(10^8\div10^3=10^{8-3}=10^5\)

d) \(a^7\div a^2=a^{7-2}=a^5\)

2.

\(987=900+80+7\\ =9\times100+8\times10+7\\ =9\times10^2+8\times10^1+7\times10^0\)

\(2021=2000+20+1\\ =2\times1000+2\times10+1\times1\\ =2\times10^3+2\times10^1+1\times10^0\)

\(abcde=a\times10000+b\times1000+c\times100+d\times10+e\times1\\ =a\times10^4+b\times10^3+c\times10^2+d\times10^1+e\times10^0\)

còn bài 2

a, 4⁸.8⁴

= (2²)⁸.(2³)⁴

= 2¹⁶.2¹²

= 2²⁸

b, 4¹⁵.5¹⁵

= (4.5)¹⁵

= 20¹⁵

c, 2¹⁰.15 + 2¹⁰.85

= 2¹⁰.(15 + 85)

= 2¹⁰.100

=2¹⁰.(2.5)²

= 2¹².5²

d, 3³.9²

= 3³ . (3²)²

= 3³.3⁴

= 3⁷

e, 5¹².7 - 5¹¹.10

= 5¹¹.(5.7 - 10)

= 5¹¹.25

=5¹¹.5²

=5¹³

f, \(x^1\).\(x^2\).\(x^3\)....\(x^{100}\)

= \(x^{1+2+3+...+100}\)

= \(x^{\left(1+100\right).100:2}\)

= \(x^{5050}\)

❤Em cảm ơn cô Nguyễn Thương hoài rất nhiều a!❤

a, 48.84

= (22)8.(23)4

= 216.212

= 228

b, 415.515

= (4.5)15

= 2015

c, 210.15 + 210.85

= 210.(15 + 85)

= 210.100

=210.(2.5)2

= 212.52

d, 33.92

= 33 . (32)2

= 33.34

= 37

e, 512.7 - 511.10

= 511.(5.7 - 10)

= 511.25

=511.52

=513

f, �1x1.�2x2.�3x3....�100x100

= �1+2+3+...+100x1+2+3+...+100

= �(1+100).100:2x(1+100).100:2

= �5050x5050

 a¹² : a⁸ = a^{12 -8} = a⁴ 

a¹⁰ : a = a^{10- 1} = a⁹  

a⁷ . a⁴ = a⁷⁺⁴  = a¹¹ 

\(3^4\)

\(9^2\)

\(2^6\)

\(10^8\)

3⁴

9²

2⁶

10⁸

a) 3⁴

b) 9²

c) 2⁶

d) 10⁸

^{k mik nha}

^{học tốt !}

12⁷ : 6⁷ = 2⁷

21⁵ : 81³ = ( 3³)⁵ : ( 3⁴)³ = 3¹⁵ : 3¹²  = 3³ 

giải giúp mình đi minh k cho ma

khong co dap an

358=3.100+5.10+8

     =3.10²+5.10¹+8.10⁰

abcd=a.1000+b.100+c.10+d

       =a.10³+b.10²+c.10¹+d.10⁰

.