Question

Tính nhanh

(-35) . 45 + 35 . 45

Answer 1

\(\left(-35\right)\cdot45+35\cdot45\)
\(=45\cdot\left[\left(-35\right)+35\right]\)
\(=45\cdot0\)
\(=0\)

Answer 2

\(=45\cdot\left(-35+35\right)\)

\(=45\cdot0=0\)

Answer 3

=0