27=1\3 х
х= 27 : 1\3
х=27 * 3
х= 81
1)<span>73/29</span> - 51 = <span>73/29</span> - <span>51·29/29</span> = <span>73/29</span> - <span>1479/29</span> = <span>73 - 1479/29</span> = <span>-1406/29</span>
2)-<span>1406/29</span> - 12 = -12<span>1406/29</span> = -12 <span>14 + 48·29/29</span> = -60<span>14/29</span>
прости знаю только начало
А) 725*10=7250:5=1450
40018-1450=38568
б) 903*100=90300:2=45150
5999-45150=-39151
в) 80115:3=26705*10= 267050
г) 3152:8=394*100=39400
д) 8070:6=1345
е) 8070*6=48420
10\3*6\1=60\3=20 километров