102 + 10 + 103 - 100
= 100 + 10 + 1000 - 100
= (100 - 100) + (1000 + 10)
= 0 + 1010
= 1010
102 + 10 + 103 - 100
= 100 + 10 + 1000 - 100
= 1010
ai nhanh mik k
=10^2+10^1+10^3-10^2
=10^2+(10^3-10^1)
=1000+990
=1990
102 + 10 + 103 - 100
= 100 + 10 + 1000 - 100
= (100 - 100) + (1000 + 10)
= 0 + 1010
= 1010