(720+е)*501=365730
Раскрываем скобки
(720+е)*501=365730
360720 + 501е = <span>365730
</span>
501е = 365730 - <span>360720
</span>501е = 5010
е = 5010 : <span>501
е = 10</span>
680/4+24*38-60/3=1062
680/4+(24*38-60/3)=1062
1/3 1/4 3/4 2/3 3 1/3 1/10
<span>а)7\8 - 3\4=7/8-6/8=1/8
</span><span>б) 9\10 - 2\5=9/10-4/10=5/10=1/2
</span><span>в)3\5 - 4\15=9/15-4/15=5/15=1/3
</span><span>г) 7\8 - 6\7=49/56-48/56=1/56
</span><span>д) 7\12 - 8\15 =35/60-32/60=3/60=1/20
</span><span>е)25\39 - 15\26=50/78-45/78=5/78
</span><span>ж)7\15 - 8\25=35/75-24/75=11/75
</span><span>з) 7\45 - 7\60=28/180-21/180=7/180</span>