Question

Tính nhanh:

(25+51) + (45 - 25 - 53 - 51)

Answer 1

\(\left(25+51\right)+\left(45-25-53-51\right)\)

\(=25+51+45-25-53-51\)

\(=\left(25-25\right)+\left(51-51\right)+45-53\)

\(=0+0+45-53\)

\(=-8\)

Answer 2

\(\left(25+51\right)+\left(45-25-53-51\right)\)

\(=25+51+45-25-53-51\)

\(=\left(25-25\right)+\left(51-51\right)+45-53\)

\(=0+0+45-53\)

\(=45-53\)

\(=-8\)