Question

Tính bằng cách thuận tiện 

2,15 x 132,06 - 2,15 x 23,06 + 17,85

Answer 1

`2,15 xx 132,06 -2,15 xx 23,06 + 17,85`

`=2,15 xx(132,06 -23,06 )+ 17,85`

`=2,15 xx109+ 17,85`

`=234,35+ 17,85`

`=252,2`

Answer 2

=2,15(132,06-23,06)+17,85

=2,15*109+17,85

=252,2

Answer 3

\(2,15\times132,06-2,15\times23,06+17,85\)

\(=2,15\times\left(132,06-23,06\right)+17,85\)

\(=2,15\times109+17,85\)

\(=234,35+17,85\)

\(=252,2\)