Question

Tính cách thuận tiện nhất : 3×5×36+15×42+30×11

Answer 1

\(3.5.36+15.42+30.11\)

\(=15.36+15.42+15.\left(2.11\right)\)

\(=15.36+15.42+15.22\)

\(=15.\left(36+42+22\right)\)

\(=15.100=1500\)

Answer 2

3x5x36+15x42+30x11

=15x36+15x42+15x2x11

=15x36+15x42+15x22

=15x(36+42+22)

=15x100

=1500