37600-17000-1600=19000 км Северная морская граница
<span>7 5/9+y=3 5/9 -<span>13 2/9
y=3 5/9 -13 2/9 - <span>7 5/9
y=(3-13-7)+(5/9-2/9-5/9)
</span></span>y=-17-2/9
y=-17 2/9
</span>
(12÷3целые3/5+2/3)÷1целые1/2-1целые1/3=
1)12÷18/5=12/1×5/18=10/3
2)10/3+2/3=12/3
3)12/3÷1ц1/2=12/3÷3/2=12/3×2/3=8/3
4)8/3-1ц1/3=2ц2/3-1ц1/3=1ц1/3