\(29.\left(79-34\right)-79.\left(29+34\right)\)

\(=29.79-29.34-79.29-79.34\)

\(=0-34.\left(29+79\right)\)

\(=0-34.108\)

\(=0-3672\)

\(=-3672\)

\(29.\left(79-34\right)-79.\left(29+34\right)\)

\(=29.79-29.34-79.29-79.34\)

\(=\left(29.79-79.29\right)-34.\left(29+79\right)\)

\(=0-34.108\)

\(=0-3672\)

\(=-3672\)

\(\frac{4x\left(2x29x39+2x59x79\right)}{9x29x39+9x59x79-29x39-59x79}\)  =

\(\frac{8x29x39+8x59x79}{29x39x\left(9-1\right)+59x79x\left(9-1\right)}\) =

\(\frac{8x29x39+8x59x79}{29x39x8+59x79x8}\)= \(1\)

xét riêng tỉ số và mẫu số nhé ! mình cảm ơn!

a) (-37)+14+26+37 = ( -37 + 37) + ( 14 + 26) = 40
b) (-24)+6+10+24 = ( - 24 + 24) + ( 6 + 10) = 16
c) 15+23+9-25)+(-33) = (15 - 25) + ( 23 - 33) + 9

= - 10 - 10 + 9

= - 11
d) 60+33+(-50)+(-33) = ( 60 -50) + ( 33 - 33)

= 10
e) (-16)+(-209)+(-14)+209 = ( - 16 - 14) + ( - 209 + 209)

= - 30
g) (-12)+(-13)+36+(-11)= ( - 11 -12 - 13 ) + 36

= - 36 + 36 = 0
h) -16+24+16-34 = ( - 16 + 16)+(24 - 34) = - 10
r) 25+37-48-25-37 = (25 - 25)+(37 - 37) - 48 = - 48
u) 2575+37-2576-29 = ( 2575 - 2576) + ( 37 - 29)

= - 1 + 8 = 7
i) 34+35+36+37-14-15-16-17 = ( 34 - 14 )+(35 - 15)+(36-16)+ (37 - 17)

= 80
2 . Bỏ ngoặc rồi tính
a)-7264+(1543+7264) = - 7264 + 1543 + 7264

= 1543
b) (144-97)-144 = 144 - 97 - 144 = - 97
c) (-145)-(18-145) = - 145 - 18 + 145 = - 18
d) 11+(-11+27) = 11 - 11 + 27 = 27
e) (27+514)-(486-73) = 27 + 514 - 486 + 73

= 128
g) (36+79)+(145-79-66) = 36 + 79 + 145 - 79 - 66

= 115
h) 10-[12-(-9-1) = 10 - ( 12 + 9 + 1)

= 10 - 22

= - 12
r) (-28-29+43)-(43+38) = - 28 - 29 + 43 - 43 - 38

= - 95
u ) 271 - [(-43)+271-(-17)] = 271 + 43 - 271 - 17 = 26
i ) -144-[29-(+144)-(+144) = - 144 - 29 - 144 + 144 = -173

Nhiều quá bạn

tự làm

+) \(176+483+24+117\)

\(=\left(176+24\right)+\left(483+117\right)\)

\(=200+600\)

\(=800\)

+) \(239+518+761+482\)

\(=\left(239+761\right)+\left(518+482\right)\)

\(=1000+1000\)

\(=2000\)

+) \(32+33+34+...+78+79+80\)

Số số hạng của dãy là :

\(\left(80-32\right):1+1=49\) (số)

Tổng của dãy là :

\(\frac{\left(80+32\right)\times49}{2}=2744\)

+) \(5\times125\times2\times4\)

\(=\left(5\times2\right)\times\left(125\times4\right)\)

\(=10\times500\)

\(=5000\)

+) \(25\times50\times4\times20\)

\(=\left(25\times4\right)\times\left(50\times20\right)\)

\(=100\times1000\)

\(=100000\)

+) \(17\times32+43\times17+17\times25\)

\(=17\times\left(32+43+25\right)\)

\(=17\times100\)

\(=1700\)

+) \(24\times19+29\times24+18\times24+24\times33+24\)

\(=24\times\left(19+29+18+33+1\right)\)

\(=24\times100\)

\(=2400\)

_Chúc bạn học tốt_

176+483+24+117

=176+24+483+117

=200+600

=800

5*125*2*4

=5*(125*2*4)

=5*1000

=5000

A. 176+483+24+117

=176+24+483+117

=200+600

=800

B. Chịu

C. 25*50*4*20

=(25*4)*(50*20)

=100*1000

=100000

D. 24*19+29*24+18*24+24*33+24

=24 * (19+29+18+33)+24

=24*99+24

=2376+24

=2400

K mk nhé

a) 176+483+24+117=(176+24)+(483+117)=200+600=800

b) 32+33+34+...+78+79+80=(32+80)+(33+79)+...+(55+57)+56=112+112+...+112+56(có 24 số112)=112.24+56=2688+56=2744

c)25.50.4.20=(25.4).(50.20)=100.1000=100000

d)24.19+29.24+18.24+24.33+24=24.(19+29+18+33+1)=24.100=2400

21.300+79.300

300(21+79)

300.100

30000

t nha 

21.(271+29)+79.(271+29)

=(271+29).(21+79)

=300.100

=30000

\(\left(271+29\right).\left(21+79\right)=300.100=30000\)

a)  >

b) > 

c) >   

d) < 

tui ko rảnh mà gõ cái trên nhưng có chơi free fire

bạn rank j rồi

tui chs, rank vàng( mùa trc k cương)

Bài 1

1/ (-37) +14 +26 + 37

= [(-37) + 37] + 14 + 26

= 40

2/ (-24) + 6 + 10 + 24

= [(-24) + 24] + 6 + 10

= 16

3/ 15 + 23 + (-25) + (-23)

= 15 + (-25) + [23 + (-23)]

= -10

4/ 60 + 33 + (-50) + (-33)

= [33 + (-33)] + 60 + (-50)

= 10

5/ (-16) + (-209) + (-14) + 209

= [(-209) + 209] + (-16) + (-14)

= -30

6/ (-12) + (-13) + 36 + (-11)

= (-25) + 25 = 0

7/ (-16) + 24 + 16 - 34

= [(-16) + 16] + (24 - 34)

= -10

8/ 25 + 37 - 48 - 25 - 37

= (25 - 25) + (37 - 37) - 48

= -48

9/ 2575 + 37 - 2576 - 29

= (2575 - 2576) + (37 - 29)

= -1 + 8 = 7

10/ 34 + 35 + 36 + 37 -14 -15- 16 - 17

= (37 - 17) + (36 - 16) + (35 - 15) + (34 - 14)

= 10 + 10 + 10 + 10 = 40

Bài 2

1/ -7264 + (1543 + 7264)

= -7264 + 1543 + 7264

= 1543

2/ (144 - 97) - 144

= 144 - 97 - 144

= - 97

3/ (-145) - (18 - 145)

= (-145) - 18 + 145

= - 18

4/ 111 + (-11 + 27)

= 111 - 11 + 27

= 127

5/ ( 27 + 514) - (486 - 73) 

= 27 + 514 - 486 + 73

= (27 + 73) + ( 514 - 486)

= 100 + 28 = 128

6/ (36 + 79) + (145 - 79 - 36)

= 36 + 79 + 145 - 79 - 36

= (36 - 36) + ( 79 - 79) + 145 = 145

7/ 10 - [12 - (- 9 - 1)]

= 10 - [12 - (- 10)]

= 10 - [12 + 10] = 10 - 12 - 10 = - 12

8/ (38 - 29 + 43) - (43 + 38)

= 38 - 29 + 43 - 43 - 38

= (38 - 38) + (43 - 43) - 29 = - 29

9/  271 - [(-43) + 271 - (-17)]

= 271 - [(-43) + 271 + 17]

= 271 + 43 - 271 - 17

= (271 - 271) + 43 - 17 = 26

10/ -144 - [29 - (+ 144) - (+144)]

= - 144 - [29 - 144 - 144]

= -144 - 29 + 144 + 144

= (- 144 + 144) - 29 + 144

= 115

XONG RỒI NHÌN SỐ MUỐN ĐAU MẮT !!!!!!!!!!!!!!!!!!!!!!

1) $(-81)\cdot27-3^4\cdot(-77)$

$=(-81)\cdot27-81\cdot(-77)$

$=-81\cdot[27+(-77)]$

$=-81\cdot(27-77)$

$=-81\cdot(-50)$

$=81\cdot50$

$=4050$

2) $(-16)\cdot32-(-4)^2\cdot18$

$=(-16)\cdot32-16\cdot18$

$=-16\cdot(32+18)$

$=-16\cdot50$

$=-800$

3) $(-2)^4\cdot289-16\cdot189$

$=16\cdot289+16\cdot(-189)$

$=16\cdot[289+(-189)]$

$=16\cdot(289-189)$

$=16\cdot100$

$=1600$

4) $41\cdot(-18)+41\cdot(-81)-41$

$=1\cdot(-18)+41\cdot(-81)+41\cdot(-1)$

$=41\cdot[(-18)+(-81)+(-1)]$

$=41\cdot(-18-81-1)$

$=41\cdot(-99-1)$

$=41\cdot(-100)$

$=-4100$

5) $17\cdot(-37)-23\cdot37-46\cdot(-37)$

$=17\cdot(-37)+23\cdot(-37)-46\cdot(-37)$

$=-37\cdot(17+23-46)$

$=-37\cdot(40-46)$

$=-37\cdot(-6)$

$=37\cdot6$

$=222$

6) $-48+48\cdot(-78)+48\cdot(-21)$

$=48\cdot(-1)+48\cdot(-78)+48\cdot(-21)$

$=48\cdot[(-1)+(-78)+(-21)]$

$=48\cdot(-1-78-21)$

$=48\cdot(-79-21)$

$=48\cdot(-100)$

$=-4800$

7) $29\cdot(-13)+27\cdot(-29)+(-14)\cdot(-29)$

$=-29\cdot13+27\cdot(-29)+(-14)\cdot(-29)$

$=-29\cdot[13+27+(-14)]$

$=-29\cdot(40-14)$

$=-29\cdot26$

$=-754$

$\text{#}Toru$