=5110

k mk đi mk k bn rùi 

đó n,nha !!!!!!!!!!!

50 + 50 + 50 + 50 x 10 x 10 + 10

= (50 + 50) + 50 x 10 x 10 + 10

=     100     + 500 x 10 + 10

=     100     +     5000   + 10

     = 5110

=5110

50 x 2 + 8 x 50

= (2 + 8) x 50

=     10   x 50

=       500

10 + 10 + 10 + 50 + 50 + 10 + 10

= (10 x 5) + (50 + 50)

=     50     +     100

=         150

50 x 2 + 8 x 50 

= 50 x ( 2 + 8 ) 

= 50 x    10 

= 500

10 + 10 + 10 + 50 + 50 + 10 + 10

= 10 x 5 + 50 x 5 

=    50    +   250

=         300

50x2+8x50

=50x(8+2)

=50x10

500

10+10+10+50+50+10

=10x5+50+50

=50+50+50

=50x3

=150

50 x 10 + 50 x 10

= (50 + 50) x 10

=     100 x 10

=        1000

10 x 20 + 80 x 10

= (20 + 80) x 10

=     100 x 10

=         1000

\(50.10+50.10\)

\(=500+500\)

\(=1000\)

\(10.20+80.10\)

\(=10.\left(20+80\right)\)

\(=10.100\)

\(=1000\)

50 x 10 + 50 x 10

= 500 + 500

= 1000

10 x 20 + 80 x 10

= 10 x ( 20 + 80 )

=10 x 100

= 1000

= ( 60 + 50+40+30+20+10 ) x 2000 + 1500

= 210 x 2000 + 1500

=  420000 + 1500

= 421500

= 421500 nha bn, nhớ k mk nha

=421500

tính nhanh =400

tìm x=15

k chomki,mik k lại

tính nhanh :

10 + 20 + 50 + 90 + 100 + 80 + 50

= (10 + 90) + (20 + 80) + (50 + 50) + 100

=      100    +       100    +     100    +  100

=      100 x 4 

=    400

tìm x :

x + 5 = 10 x 2

x + 5 = 20

       x = 20 - 5

       x = 15

tchs mình tch lại

10+20+50+90+100+80+50

=(10+90)+(20+80)+(50+50)+100

=100+100+100+100

=100x4

=400

x+5=10x2

=>x+5=20

=>x=20:5

=>x=4

a)

( 360 x 10 x 50 ) : 5

= 360 x [ {10 x 50} : 5 ]

= 360 x [ 500 : 5 ]

= 360 x 100

= 36000

b) 

 ( 360 x 50 x 110) : ( 5 x 11 x 9)

= ( 360 : 9 ) x ( 50 : 5 ) x ( 110 : 11 )

= 40 x 10 x 10

= 4000

( 360 x 10 x 50 ) : 5

= 180000 : 5

= 36000

(360 x 50 x 110 ) : (5 x 11 x 9)

= 1980000 : 495

= 4000

=(250-50)- (0,95x40)x(10x0,1)x(0,125x80)
=200 - (38 x1x10)
=200-380
=-180 
 

99570

99,570

=9*3,67^2*(11,2*3-11,2-11,2*2)

=0

0,9 × 50 × 2 + 3 × 51 × 0,6 - 0,18 × 10

= 1,8 × 50 + 1,8 × 51 - 1,8

= 1,8 × (50 + 51 - 1)

= 1,8 × 100

= 180

0,9 x 50 x 2 + 3 x 51 x 0,6 - 0,18 x 10

= (0,9 x 2) x 50 + (3 x 0,6) x 51 - 1,8

= 1,8 x 50 + 1,8 x 51 - 1,8 x 1

= 1,8 x (50 + 51 - 1)

= 1,8 x 100

= 180

0,9x50x2+3x51x0,6-0,18x10
=0,9x2x50+3x0,6x51-0,18x10
=0,18x50+0,18x51-0,18x10
=0,18x(50+51-10)
=0,18x91
=16,38