1)2/15 * 2 6/7=40/105=8/21
2)18 1/6 - 1 11/14=109/6-25/14=763/42-75/42=688/42=344/21
3)344/21-8/21=336/21=16
1 способ:
1)200-120=80 л вмещает бочонок
<span> 80*5=400 литров
</span><span>2 способ:
1)200*5=1000
2)120*5=600
3)1000-600=400
</span>
<span>79/6 = 13,17; 87/7 = 12,4; 53/3 = 17,7; 55/4 = 13,75; 697/3 = 232,3; 489/6 = 81,5; 605/6 = 100,8; 642/8 = 80,25; 843/8 = 105,4; 218/7 = 31,1; 887/4 = 221,8.</span>