a)7032

14660

58510

b) 434390

597023

800000

27168 :32+154*26-4685) *(253-23*110

=27168 :32+154*26-4685)*0

=0

tick nha

 3145 - 246 + 2347 - 145 + 4246 - 347

= (3145 - 145) + (4246 - 246) + (2347 - 347)

= 3000 + 4000 + 2000

= 7000 + 2000

= 9000

 3145 - 246 + 2347 - 145 + 4246 - 347

= (3145 - 145) + (2347 - 347) + (4246 - 246)

= 3000 + 2000 + 4000

= 5000 + 4000

= 9000

Tk cho mình nha ae!!!!!!!!!!!!!!! Ai tk mình thì mình tk lại.

Tính nhanh : 

3145 - 246 + 2347 - 145 + 4246 - 347 

= ( 3145 - 145 ) + ( 2347 - 347 ) + ( 4246 - 246 )

= 3000 + 2000 + 4000

= 5000 + 4000

= 9000

a)

349 + 602 + 651 + 398

= (349 + 651 ) + (602 + 398)

= 1000 + 1000

= 2000

b) 

3145 - 246 + 2347 - 145 + 4246 - 347

= (3145 - 145) + (4246 - 246) + (2347 - 347)

= 3000 + 4000 + 2000

= 7000 + 2000

= 9000

\(349+602+651+398\)

\(=\left(349+651\right)+\left(602+398\right)\)

\(=1000+1000\)

\(=2000\)

_____

\(3145-246+2347-145+4246-347\)

\(=\left(3145-145\right)+\left(2347-247\right)+\left(4246-246\right)\)

\(=3000+2000+4000\)

\(=9000\)

\(349+602+651+398=\left(349+651\right)+\left(602+398\right)=1000+1000=2000\)\(3145-246+2347-145+4246-347=\left(3145-145\right)+\left(4246-246\right)+\left(2347-347\right)=3000+4000+2000=9000\)

( 27168/32+154*26-4685)*(253-23*11)

=(     849   + 4004  - 4685)*(253- 253)

=               168                   *    0

=                      0

(145 -145)+(4246-246) +(2347+347)

=0 + 4000 + 2694

= 6694

a.(4276+5724)+(2357+7643)

=10000           +  10000

=20000

b.câu này không biết:)))

c.câu này cũng không biết :)))

a)4276+2357+5724+7643
= (4276+5724)+(2357+7643)
= 1000+1000
= 2000
b)3145-246+2347-145+4246-347
= (3145-145)+(4246-246)+(2347-347)
= 3000+4000+2000
= 9000
c)(45-5x9)x2x3x4x5x6x7x8x9
= (45-45)x2x3x4x5x6x7x8x9
=0x2x3x4x5x6x7x8x9
=0

c.(45-5x9)x2x3x4x5x6x7x8x9

=(45-45)x2x3x4x5x6x7x8x9

=0x2x3x4x5x6x7x8x9

=0

thui nha=)))