Question

Tinh nhanh :12.57+57.15+63.15

Answer 1

12,57 + 57,15 + 63,15

= 12,57 + (57,15 + 63,15)

= 12,57 + 120,3

= 132,87

Answer 2

\(12.57+57.15+63.15\)

\(=12.57+15.\left(57+63\right)\)

\(=12.57+15.120\)

\(=12.57+15.10.12\)

\(=12.57+150.12\)

\(=12.\left(57+150\right)\)

\(=12.207\)

\(=2484\)

Answer 3

12.57+57.15+63.15

=12.57+15.(57+63)

=12.57+15.120

=12.(57+150)

=12.207=2484

Answer 4

12x57+57x15+63x15

Answer 5

\(12.57+57.15+63.15\)

\(=12.57+15.\left(57+63\right)\)

\(=12.57+15.120\)

\(=684 +1800\)

\(=2484\)