Question

Tính nhanh bài: 2.31.12+4.6.42+8.27.3

Answer 1

=(24.31)+(24.42)+(24.27)

=24.(31+42+27)

=24.100

=2400

Answer 2

2.31.12+4.6.42+8.27.3

=24.31+24.42+24.27

=24.(31+42+27)

=24.100

=2400

Answer 3

    \(2.31.12+4.6.42+8.27.3\) 

\(=\left(2.12\right).31+\left(4.6\right).42+\left(8.3\right).27\)

\(=24.31+24.42+24.27\)

\(=24.\left(31+42+27\right)\)

\(=24.100=2400\)

k nha