đs 14 100000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000 % đó 

10+10-2=18 đó bạn

x + 60 = 120

        x = 120 - 60

        x = 60                   ai tk mk, mk tk lại~~~~~~~~~~~~

1000 + 10 đương nhiên bằng 1010

2,.2=4

2^2=4

1.4=4

Vậy cậu làm đi

999+888+777+666+555+444+333+222+111=4995

1093867+1573941=2667808

16 x 80 + 16 x 20

= 16 x ( 80 + 20 )

= 16 x 100

= 1600                             k mk,mk sẽ k lại bn!

x + 100 - 200 = 500 x 2 + 100

x + 100 - 200 = 1000 + 100

x + 100 - 200 = 1100

x + 100         = 1100 + 200

x + 100         = 1300

x                  = 1300 - 100

x                  = 1200