<span>23,6+(14,5-30,1)-(6,8+1,9)=?</span>
<span>1) 14,5 - 30,1 = - 15,6</span>
<span>2) 6,8 + 1,9 = 8,7</span>
<span>3) 23,6 - 15,6 = 8</span>
<span>4) 8 - 8,7 = - 0,7</span>