B=453 . 138 - 110 =453 . 137 + 453-110=137 . 453 +343
A=137 . 453 + 137 +206 =137 . 453 + 343
Do đó A=B
A= 137 . 453 +137 +206=137 . 453 +343
B=137 . 453 + 453 -110=137 . 453 +343
Do đó A=B
\(A=137.454+206\)
\(=137.453+453-110=137.453+343\)
\(B=137.453+453-110\)
\(=137.453+343\)
\(\Rightarrow A+B\)