Ответы и объяснения

2013-10-22T05:58:33+00:00
1. 5/9-187/9=-182/9
2. 35 9/10-1508/10=20 1/10
3. 2/4:4/6=2/4*6/4=1/1*3/1=3
4. 13+18=31
5.15/14=15/14=1 1/14
6. 11*11=121
7. 32/8=4
8. 18,5*19,3=357,05
9. 150000000000:300000000=500
10. 0,5*12=6
11. 987-654=333
12. 555*555=308025
13. 36/9=4
14. 56/4=14
15. 34,23-23,13=11,1
16.38+2=40
17. 25*36=900
18. 368+632=1000
19. 43658-22125=11543
20. 500+500=1000