16 + (- 28) - 3 = 16
20 + 44 - (- 6 )+ 10 = 8
3:х=1:1000000
х=3*1000000=3000000см=30000м=30км
<span>-3/8+1/2=-3/8+4/8=1/8</span>
3 2 7
5 4 6
-------
1 9 5 2
1 3 0 8
1 6 3 5
--------------
1 7 8 5 3 2
======================
2 8 3
7 0 3
-------
8 4 9
1 9 8 1
--------------
1 9 8 9 4 9