Մաթեմատիկա

7.9=63                   8.9=72                   5.9=45                   18:9=2                   9:9=1

6.9=54                   4.9=36                   9.5=45                   27:9=3                   36:9=4

9.9=81                   3.9=27                   8.7=56                   45:9=5                   63:9=7

2.9=18                   10.9=90                8.8=64                   81:9=9                   90:9=10