12.3=36

5.120=600

(+5).(+120)

=600

12.3 = 36

5.120 =600

(+5).(+120) = 600 

k mình nha 

12.3=36

5.120=600

(+5).(+120)

=600

nhanh thi co!

cham tay thi het!

\(2.3^3+4.3^2\\ =2.3^2\left(3+4\right)\\ =2.9.7\\ =125.\)

Sửa lại:

  \(2.3^3+4.3^2\\ =2.3^2\left(3+4\right)\\ =2.9.7\\ =126.\)

\(2^4.32>2^x>64\\ \Leftrightarrow2^4.2^5>2^x>2^6\\ \Leftrightarrow2^9>2^x>2^6\\ \Leftrightarrow9>x>6\)

=> x=7 hoặc x=8

2⁴.32>2^x>64

=>2⁹>2^x>2⁶

=>9>x>6

=>x€{8;7}

4.25+4.32+4.39+4.46+4.53

=4.(25+32+39+46+53)

=4.195

=780

= 4.(25 + 32 + 39 + 46 + 53)

= 4.195=780

=4.(25+32+39+46+53)

=4.195

=780

a, 27.123-27.23

^{=27.( 123-23)} 

^=27.100

⁼²⁷⁰⁰

b,2.2²+ 3⁵:3³-156⁰

=2.4+ 3^5-3-1

=8 + 3²-1

=8+9-1

=16

c,30+ [ 125-(16-14) ²

=30+( 125-2²)

=30+ ( 125-4)

=30+121

=151

 27 . 123 - 27 . 23

= 27 . ( 123 - 23 )

= 27 . 100 = 2700

b, 2.2^2+3^5:3^3-156^0

= 2 .4  + 3^2 -1

= 8 + 9 - 1 

= 16

c, 30 + [ 125 - ( 16 - 14 ) ^2 ]

= 30 + [ 125 - 2^2 ]

= 30 + 121

= 151

= 4(25 + 32 + 39 + 46 + 53)

= 4 . 195

= 780

k giùm

=4(25+32+39+46+53)

=780

= 4.(25+32+46+39+53)

=4.195

= 780

4,302 ; 4,32 ; 5,034 ; 5,043

5,043; 5,034; 4,32; 4,032

5,043; 5,034; 4,32; 4,032.

B = 5 . 3 2 + 4 . 3 2 =   81   =   34   =   9 2