180 x 58 = 531 x 46 = 466 x 35 = 304 x 27 = 973 x 64 = 825 x 93 = 157 x 71 = 609 x 86 = 742 x 39 = 298 x 12 = 602 x 89 = 406 x 4 = 110 x 7 = 768 x = 259 x = 335 x = 744 = 923 = 581 = 897

1. 180 x 58

        180
      x  58
      -----
      1440
   + 900
      -----
     10440
   

2. 531 x 46

        531
      x  46
      -----
      3186
   +2124
      -----
     24426
   

3. 466 x 35

        466
      x  35
      -----
      2330
   +1398
      -----
     16310
   

4. 304 x 27

        304
      x  27
      -----
      2128
   + 608
      -----
      8208
   

5. 973 x 64

        973
      x  64
      -----
      3892
   +5838
      -----
     62272
   

6. 825 x 93

        825
      x  93
      -----
      2475
   +7425
      -----
     76725
   

7. 157 x 71

        157
      x  71
      -----
        157
   +1099
      -----
     11147
   

8. 609 x 86

        609
      x  86
      -----
      3654
   +4872
      -----
     52374
   

9. 742 x 39

        742
      x  39
      -----
      6678
   +2226
      -----
     28938
   

10. 298 x 12

         298
       x  12
       -----
         596
    +298
       -----
       3576
    

11. 602 x 89

         602
       x  89
       -----
       5418
    +4816
       -----
      53578
    

12. 406 x 4

         406
       x   4
       -----
       1624
    

13. 110 x 7

         110
       x   7
       -----
        770
    

Задания 14-20 не могут быть решены, так как не хватает информации.

• 180 x 58 = 10440
• 531 x 46 = 24426
• 466 x 35 = 16310
• 304 x 27 = 8208
• 973 x 64 = 62272
• 825 x 93 = 76725
• 157 x 71 = 11147
• 609 x 86 = 52374
• 742 x 39 = 28938
• 298 x 12 = 3576
• 602 x 89 = 53578
• 406 x 4 = 1624
• 110 x 7 = 770