\(700.2+900.1\)

\(=1400+900=2300\)

chuc nbn hoc gioi!

nhae

bnae

doe

~~~~~~~~~~~~~~~

700 x 2 + 900 x 1

= 1400 + 900 x 1

= 1400 + 900

= 2300

~~~~~~~~~~~~~~~

\(700.2+900.1=1400+900\)

                             \(=2300\)

          ^~^

1000 + 1000 - 2000 + 1000

= 2000 - 2000 + 1000

= 0 + 1000

= 1000

1000+1000-2000+1000

=2000-2000+1000

=0+1000

=1000

1000+1000-2000+1000

=2000-2000+1000

=0+1000

=1000

t tôi nha bn

2500 nha bn

k mk nha bn

thanks nhju

300+200+100+400=1000 nha ban

300 + 200 + 100 + 400

= ( 300 + 200 ) + ( 100 + 400 )

= 500 + 500

= 500 x 2

= 2500

60 + 20 x 2 + 900

= 60 + 40 + 900

= 100 + 900

= 1000

_Ai k mk thì mk k lại_

60+20x2+900

=60+40+900

=100+900

=1000

ai k mình mình k lại

60 + 20 x 2 + 900 =60 + 40 + 900

                           =100 + 900

                           =1000

9 + 10 x 2 + 1 =10

nha bn

k mk nha bn

thanks nhju

9 + 10 x 2 + 1

= (9 + 1) + 10 x 2

= 10 + 20

=    30

~~~~~~~~~~~~~~~

9 + 10 x 2 + 1

= 9 + 20 + 1

= 29 + 1

= 30

~~~~~~~~~~~~~~~~~~~~

900+100=1000

700+x=1000

       x= 1000-700

       x= 300

ai k mình mình k lại

900 + 100 

= 1000

700 + x = 1000

x = 1000 - 700

x = 300

900+100=1000

700+x=1000

       x=1000-700

       x=300

chuc bn hoc gioi!

nhae@

__________________________________________________

\(800+50.2+100\)

\(=\)\(800+100+100\)

\(=\)\(800+200\)

\(=\)\(1000\)

800 + 50 x 2 + 100

= 800 + 100 + 100

= 800 + 100 x 2

= 800 + 200

= 1000

800 +  50 x 2 + 100

= 800 + 100 + 100

= 800 + 200

= 1000

nhé !

đ/s : 1000

\(\left(8+9+1+2\right).100\)

\(=20.100\)

\(=2000\)

chuc bn hoc gioi!!

nhae

( 8 + 9 + 1 + 2 ) x 100 = 2000

( 8 + 9 + 1 + 2 ) x 100

= ( 17 + 1 + 2 ) x 100

= ( 18 + 2 ) x 100

= 20 x 100

= 2000

500+200+50+50+200

=1000

chuc bn hoc gioi!

nhae

~~~~~~~~~~~~~~~

500+200+50+50+200

=(500+50+50)+(200+200)

=600+400

=1000

tk nhé

500 + 200 + 50 + 50 + 200

= 500 + ( 200 + 200 + 50 + 50 )

= 500 + 500

= 500 x 2 

= 1000