1: \(23+\left(-13\right)+\left(-50\right)\)

\(=23-13-50\)

=10-50

=-40

2: \(-5+15+\left(-123\right)\)

\(=\left(-5+15\right)-123\)

=10-123

=-113

3: \(5871:\left\{928-\left[\left(-82+247\right)\right]\right\}\cdot5\)

\(=5871-\left\{928+82-247\right\}\cdot5\)

\(=5871-763\cdot5=5871-3815=2056\)

4: \(40-\left(4\cdot5^2-3\cdot2^3\right)\)

\(=40-4\cdot5^2+3\cdot2^3\)

\(=40-4\cdot25+3\cdot8\)

=40-100+24

=64-100

=-36

5: \(6^2\cdot5-7^2+149\)

\(=36\cdot5-49+149\)

\(=180+149-49\)

=180+100

=280

6: \(-210:\left[16+3\cdot\left(6+3\cdot2^2\right)\right]+\left(-2022\right)\)

\(=-210:\left[16+3\cdot\left(6+3\cdot4\right)\right]+\left(-2022\right)\)

\(=-210:\left[16+3\cdot18\right]+\left(-2022\right)\)

\(=-210:70-2022\)

=-3-2022

=-2025

7: \(5\cdot2^3+7^{11}:7^9-2023^0\cdot1^8\)

\(=5\cdot8+7^2-1\)

=40+49-1

=39+49

=88

8: \(400:\left\{5\cdot\left[360-\left(290+2\cdot5^2\right)\right]\right\}\)

\(=400:\left\{5\cdot\left[360-290-2\cdot25\right]\right\}\)

\(=400:\left\{5\cdot20\right\}\)

\(=\dfrac{400}{100}=4\)

9: \(75-\left(3\cdot5^2\right)-4\cdot5^3\)

\(=75-3\cdot25-4\cdot5^3\)

=-4*125

=-500

1)...=135+65+360+40+24=200+400+24=624

2)...=(8.125).(4.25)=1000.100=100000

4)...= (467+433)+(238+762)+3465=990+1000+3465=5455

5)...=129.(172-73+1)=129.100=12900

6)...=205-(1200-(16-6)³):40=205-(1200-1000):40=205-200:40=205-5=200

Trả lời chi tiết giúp mình đc ko

a)  - 13 12

250 - 600 : 5 = 250 - 300 = -50

250-600:5

=250-120

=130

250-600:5

=250-120

=130

chúc bạn học tốt

Lời giải:
$A=2^{50}-2^{49}-...2^2-2$

$-A=2+2^2+2^3+...+2^{49}-2^{50}$

$-2A=2^2+2^3+2^4+...+2^{50}-2^{51}$

$-A-(-2A)=(2-2^{50})-(2^{50}-2^{51})$

$A=2-2^{50}-2^{50}+2^{51}=2-2^{51}+2^{51}=2$

a ,   - 13 12 b ,   4 9 c ,   53 48

5 x 10 + 200 = 50 + 200 = 250

40 : 5 + 79 = 8 +79 = 87

270 – 5 × 5 = 270 – 25 = 245

900 + ( 120 : 1 + 0 : 250 ) = 900 + ( 120 + 0 )

                                          = 900 + 120

                                          = 1020

Chúc bạn học tốt ! Mik hứa sẽ tk lại ! Thanks !

900+(120:1+0:250)

=900+(120+0)

=900+120

=1020

=900+(120+0)

=900+120

=1020

~  dễ ợt~

= 0 nhé!

250 : 50 - ( 46 - 75 + 54 ) : 5 

=  5 - 25 : 5

=  5 - 5

= 0

Các bạn tk cho mình nha

\(250:50-\left(46-75+54\right):5\)

\(=5-\left[\left(-29\right)+54\right]:5\)

\(=5-25:5\)

\(=5:5=0\)