12 : 3 = 4 x 4 = 16

20 x 3 = 60

90 : 1 = 90

123 - 123 = 0

10 x 9 = 90 : 9 = 10

12 - 9 = 3 x 9 = 27

23 - 5 = 18

123 + 12 = 135

1000 - 200 = 800

333 - 111 = 222

\(20.3=60\)

\(90.1=90\)

\(123-123=0\)

\(10.9=\frac{810}{9}=90\)

\(23-5=15\)

\(123+12=135\)

\(1000-200=800\)

\(333-111=222\)

( 123 . 456 - 23 . 16 ) . ( 12 . 9 - 4 . 27)

= ( 56088 - 368) . ( 108 - 108 )

= 55720 . 0

= 0

( 123 x 456 - 23 x 16 ) x ( 12 x 9 -4 x 27 )

=( 123 x 456 - 23 x 16 ) x (108 -108)

=( 123 x 456 - 23 x 16 ) x 0=0

( 123 x 456 - 23 x 16 ) x ( 12 x9 - 4 x 27 )  = ( 123 x 456 - 23 x 16 ) ( x 108 - 108 ) 

                                                               =  557 / 0 

                                                               = 0

Chúc bạn học tốt Kane thân mến ! 

(123x456-23x46)x(12x9-4x27)

=.......x.....

=0

( 123 * 456 - 23 * 46) * (12 * 9 - 4 * 27) = 55030 * 0

                                                        = 0.

( 123 . 456 - 23 . 46 ) . ( 12 . 9 - 4 . 27)

= ( 123 . 456 - 23 . 46 ) . ( 108 - 108 )

= ( 123 . 456 - 23 . 46 ) . 0

= 0

\(123+123+12+23=281\)

\(12+34-2=44\)

K mình nha mình sẽ k bạn thề luôn!

123 + 123 + 12 + 23

= 123 x 2 + 35

= 281

a) =281

b) =44

123 + 23 = 146

12 : 4 = 3

k mk nha ,mk đang bị âm 23 điểm hỏi đáp tuần ấy huhu...

123 + 23 = 146

12:4 = 3

123+23=146

12:4=3

|x+23|^2002|+|y-12|^123=0

<=>|x+23|^2002\(\ge\) 0

      \(\left|y-12\right|^{^{123}}\ge0\)

=>\(\left|x+23\right|^{2002}+\left|y-12\right|^{123}\ge0\)

=>x+23=0=>x=-23

=>y-12=0=>y=12

\(\left|x+23\right|^{2002}+\left|y-12\right|^{123}=0\)

\(\Rightarrow\hept{\begin{cases}\left|x+23\right|^{2002}=0\\\left|y-12\right|^{123}=0\end{cases}}\Rightarrow\hept{\begin{cases}x+23=0\\y-12=0\end{cases}}\Rightarrow\hept{\begin{cases}x=-23\\y=12\end{cases}}\)

Vậy \(x=-23;y=12\)

Vì \(\left|x+23\right|^{2002}\ge0;\left|y-12\right|^{123}\ge0\forall x;y\)

\(\Rightarrow\left|x+23\right|^{2002}+\left|y-12\right|^{123}\ge0\forall x;y\)

Mà đề lại cho \(\left|x+23\right|^{2002}+\left|y-12\right|^{123}=0\)

\(\Leftrightarrow\left|x+23\right|^{2002}=0;\left|y-12\right|^{123}=0\)

\(\Rightarrow x=-23;y=12\)

\(12+23>23:23\)

\(123-123=22-22\)

\(13-6< 23\)

\(90-3>24\)

12+23>23:23     13-6<23

123-123=22-22     90-3>24

.

Trả lời:

12 + 23 > 23 : 23

123 - 123 = 22 - 22

 13 - 6 < 23 

90 - 3 > 24

a: =6/35x39/54=13/105

b: \(=\dfrac{-5}{7}\left(\dfrac{2}{11}+\dfrac{9}{11}\right)+\dfrac{12}{7}=\dfrac{-5}{7}+\dfrac{12}{7}=1\)