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9 tháng 12 2018

a) x= 0.2 = 1/5

b) x=2

9 tháng 12 2018

a) 2009 : x -1009 : x = 5000

(2009 -1009) : x = 5000

1000 : x = 5000

x = 1/5.

b) 234 * x + 766 * x = 2000

( 234 + 766 ) * x = 2000

1000 * x = 2000 

x = 2

3 tháng 2 2022

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21 tháng 4 2019

\(\left(366+434\right)\times\frac{1009}{500}+\frac{1009}{500}\times199+\frac{1009}{500}\)

\(=800\times\frac{1009}{500}+\frac{1009}{500}\times199+\frac{1009}{500}\)

\(=\left(800+199+1\right)\times\frac{1009}{500}\)

\(=1000\times\frac{1009}{500}\)

\(=2018\)

~ Thiên Mã ~

21 tháng 4 2019

\(\left(366+434\right)\times\frac{1009}{500}+\frac{1009}{500}\times199+\frac{1009}{500}\)

\(=800\times\frac{1009}{500}+\frac{1009}{500}\times199+\frac{1009}{500}\times1\)

\(=\left(800+199+1\right)\times\frac{1009}{500}\)

\(=1000\times\frac{1009}{500}\)

\(=\frac{1009000}{500}=2018\)

a,234.4+234.5+234=234(4+5+1)=234.10=2340

b,135.16-135.2-135.4=135(16-4-2)=135.10=1350

c,1/2+1/4+1/8+1/16+1/32+1/64=1-1/2+1/2-1/4+1/4-1/8+1/8-1/16+1/16-1/32=1-1/32=31/32

27 tháng 8 2015

a) 234 x4 + 234 x 5 + 234 = 234 x ( 1+4+5)=2340

b)135 x16 -135 x2 -4 x135 =135 x (16-2-4) =1350

a) 15/3 x 7/5 + 7/5 x 10/3 + 7/5

= (15/3 + 10/3  + 1) x 7/5

= 28/3 x 7/5

= 196/15

c) 2009 + 3567 + 6433 - 1009

= (2009 - 1009 ) + (3567 + 6433)

= 1000 + 10000

= 11000

26 tháng 3 2017

\(\frac{15}{3}\)x\(\frac{7}{5}+\frac{7}{5}\)x\(\frac{10}{3}+\frac{7}{5}\)

\(\frac{15}{3}\)\(\frac{7}{5}+\frac{7}{5}\)\(\frac{10}{3}+\frac{7}{5}x1\)

=\(\left(\frac{15}{3}+\frac{10}{3}+1\right)\)\(\frac{7}{5}\)

\(\frac{100}{3}\)\(\frac{7}{5}\)

=\(\frac{140}{3}\)

\(\frac{1212}{1717}\)\(\frac{165165}{132132}\)x\(\frac{515151}{515151}\)

\(\frac{12}{17}\)\(\frac{165}{132}\)\(\frac{51}{51}\)

\(\frac{12}{17}\)x\(\frac{165}{132}\)x 1

\(\frac{165}{187}\)

2009 + 3567 + 6433 - 1009

= ( 2009 - 1009 ) + (3567 +6433 )

=1000 + 10000

= 11000

23 tháng 11 2021

a) 54 x 2009 + 45 x 2009 + 2009

= 54 x 2009 + 45 x 2009 + 2009 x 1

= 2009 x ( 54 + 45 + 1)

= 2009 x 100

= 200900

b) 117 x ( 83 + 17 ) - 17 x ( 17 + 83)

= 117 x 100 - 17 x 100

= 100 x ( 117 - 17 )

= 100 x 100

= 10000

c) 997 x 4 + 997 x 6

= 997 x ( 6 + 4 )

= 997 x 10

= 9970

_HT_

2 tháng 11 2015

2009.11-2000-9

=2009.11-(200+9)

=2009.11-2009

=2009.(11-1)

=2009.10

=20090

tik mik nha!!!

2 tháng 11 2015

2009.11-2000-9

=2009.11-(200+9)

=2009.11-2009

=2009.(11-1)

=2009.10

=20090

5 tháng 12 2021

a) \(437\times136-437\times125\)

\(=437\times\left(136-125\right)\)

\(=437\times11\)

\(=4807\)

b) \(2009\times71+29\times2009\)

\(=2009\times\left(71+29\right)\)

\(=2009\times100\)

\(=200900\)

5 tháng 12 2021

a) 437 x 136 - 437 x 125

= 437 x (136 - 125 )

= 437 x 11

=  4807

b) 2009 x 71 + 29 x 2009

= 2009 x ( 71 + 29 ) 

= 2009 x 100

= 200900