C ??

Máy tính nha bạn!^^

1/1113+1/1114*11/1122/45/5=1/1113+1/1114*11/1122/45/5

lấy máy tính

\(\frac{1}{1113}+\frac{1}{1114}.\frac{11}{1122}:\frac{45}{5}=8.994504463x10^{-4}\)

1122 x 34 + 2244 x 83

 = 1122 x 2 x 17 + 2244 x 83.

= 2244 x 17 + 2244 x 83

=2244 x ( 17 + 83 )

= 2244 x 100

 = 224400

kết quả là 224400

=227800

\(\frac{3}{5}+\frac{6}{11}+\frac{7}{13}+\frac{2}{5}+\frac{16}{11}+\frac{19}{13}=\left(\frac{3}{5}+\frac{2}{5}\right)\left(\frac{6}{11}+\frac{16}{11}\right)\left(\frac{7}{13}+\frac{19}{13}\right)=1+2+2=5\)

Ta có:3/5+2/5=5/5=1; 6/11+16/11=22/11=2; 7/13+19/13=26/13=2

kết quả là 1+2+2=5

\(\frac{3}{5}+\frac{6}{11}+\frac{7}{13}+\frac{2}{5}+\frac{16}{11}+\frac{19}{13}\)

\(=\left(\frac{3}{5}+\frac{2}{5}\right)+\left(\frac{6}{11}+\frac{16}{11}\right)+\left(\frac{7}{13}+\frac{19}{13}\right)\)

\(=\frac{5}{5}+\frac{22}{11}+\frac{26}{13}\)

\(=1+2+2=5\)

396,99

tick nhé 

mình nhanh nhất

ai tick mik mik tick lại cho

=(11+99) +(22+88)+(33+88) +(44+66)+55 :100

=110+110+110+110 +55:100

=440+55:100

=495 :100

=4,95

TICK NHA

a)12/3
b)8/3
c)43/19
d)5/11

12/3 , 8/3 ,43/19 , 5/11

5³⁶ = 5^3.12 = (5³)¹² = 125¹²

11²⁴ = 11^2.12 = (11²)¹² = 121¹²

Vì 125¹²>121¹² nên 5³⁶ > 11²⁴

Lời giải:
Đặt \(\underbrace{111....1}_{100}=a\Rightarrow 9a+1=1\underbrace{000...0}_{100}\)

Khi đó:
\(\underbrace{1111....1}_{100}\underbrace{222....2}=\underbrace{111...1}_{100}\times 1\underbrace{00...0}_{100}+\underbrace{222....2}_{100}\)

\(a(9a+1)+2a=9a^2+3a=3a(3a+1)\) là tích của 2 số
 tự nhiên liên tiếp $3a, 3a+1$

Ta có đpcm.