\(34,4\times12-34,4:0,5\)
\(=34,4\times12-34,4\times2\)
\(=34,4\times\left(12-2\right)\)
\(=34,4\times10\)
\(=344\)
34,4 \(\times\) 12 - 34,4: 0,5
= 34,4 \(\times\) 12 - 34,4 \(\times\) 2
= 34,4 \(\times\) ( 12 - 2)
= 34,4 \(\times\) 10
= 344