=7.15x2+7.15x12-7.15x4
=7.15x(2+12-4)
=7.15x10
=71.5
7,15 : 0,5 + 7,15 * 12 - 7,15 : 25 %
=7,15 : 5/10 + 7,15 * 12 -7,15 : 25/100
=7,15 * 10/5 +7,15 * 12 -7,15 * 25/100
=7,15 * 2 + 7,15 * 12 - 7,15 *4
=7,15 * ( 2+12-4)
=7,15 * 10
=71,,5
\(7,15\div0,5+7,15\times12-7,15\div25\%\)
\(\left(7,15\div0,5-7,15\div25\%\right)+7,15\times12\)
\(\left(7,15\div\frac{1}{2}-7,15\div\frac{1}{4}\right)+7,15\times12\)
\(\left(7,15\times2-7,15\times4\right)+7,15\times12\)
\(7,15\times\left(2-4\right)+7,15\times12\)
\(7,15\times\left(-2\right)+7,15\times12\)
\(7,15\times[\left(-2\right)+12]\)
\(7,15\times10\)
\(71,5\)