100 + 10 + 1 = 110 +1 = 111

100 + 10 + 1 = 111

100+10+1=111

100 -10 - 1 = 89

100-10-1=89

100-10-1

=90-1

=89

tk nhe

trao doi!

100-2-2

=98-2

=96

100-2-2=98-2=96

100-2-2

=98-2

=96

bn nhe

tk nhe

=10000+1000+100+10+1

=11000+100+10+1

=11100+10+1

=11110+1

=11111

trao đổi !

=    11111

10000+1000+100+10+1=11111

nha mk

10-1-1-1

=9-1-1

=8-1

=7

tk nhé

10-1-1-1= 10-(1+1+1)= 10-3=7

Vậy 10-1-1-1=7

cau tra loi la 7 ban nhe .

vi 10-1-1-1

=9-1

=8-1

=7

10-1-2

=-9-2

=7

tk nhe

\(10-1-2\)

\(=9-2\)

\(=7\)

10-1-2=7 ban nhe nho k cho minh nhe

=6 nka k mk mk k lại         

\(10-2-2\)

\(=10-\left(2+2\right)\)

\(=10-4=6\)

= 6 quá dễ

bằng 6

6 minh nhe

9 -  2 - 1 = 6

x + 100 = 50 x 2 + 100 - 100 + 200 - 800 + 1 000

x + 100 = 100 + 100 - 100 + 200 - 800 + 1 000

x + 100 = 100 + 200 - 800 + 1 000

x + 100 =    ( -500) + 1 000

x + 100 = 500

x = 500 - 100

x = 400.

x+100=50.2+100-100+200-800+1000

x+100=100+100-100+200-800+1000

x+100=200-100+200-800+1000

x+100=100+200-800+1000

x+100=300-800+1000

x+100=-500+1000

x+100=500

x=500-100

x=400