Մաթեմատիկա 16․03․2021

812.

1     3         3×2           6                                       6       3                                         2         2

–– x –– = ––––– = ––––                                   2        2                                         1

2      2          2×1         2                                     1

6       5        7×5         35                                        35      5                                                          42     2

–– x –– = ––––– = –––––                                    7        7                                                           21    3

7       7         7×6        42                                       1                                                                       7      7

                                                                                                                                                            1

9      10      11×9        99                                               99            3                                                      100       10

–– x –– = ––––– = –––––                                            33            3                                                       10         2

10    11     10×10       100                                             11          11                                                       5          5

  1. 1

13    45      26×13     338

–– x –– = –––––– = ––––                                       675       5                                                338       338

15    26      45×15       675                                       135      5                                                    1

                                                                                    27     27

                                                                                         1

43    15     15×15     225

–– x –– = ––––– = ––––                                                255     15                                                       731      731

15    17   43×17       731                                                  15       3                                                          1

                                                                                            5       5

                                                                                            1

15    7        27×7      189

–– x –– = ––––– = –––––                                                      450    5                                                 189      3

28    30    30×15       450                                                        90     3                                                    63      3

                                                                                                  30    5                                                     21     3

                                                                                                  6      3                                                      7       7

                                                                                                  2      2                                                      1

                                                                                                   1

35    17    35×15   525

–– x –– = ––––= –––––                                                          867  17                                                          525     15

51    15    51×17    867                                                             51   51                                                            35     5

                                                                                                    1                                                                      7      7

                                                                                                                                                                            1

813․

1      2      3        1x2x3         6

–– x –– x –– = ––––––– = ––––

2      3      4         2x3x4       24

5      7      13       13x7x3          273

–– x –– x –– = ––––––––– = ––––––

7      13    18     18 x13x7          1638

42       1     39        42×39            1638

––– x –– x –– = ––––––––– = –––––––––

39      42    60      60x42x39      98280

101     102    103     103×102                   10506

––– x ––– x ––– = ––––––––––––– = ––––––––––

102     103    104     104x103x102        1092624

816.

1            1     3         3

– x 3 =   –  x  – =  –––

4            4     1         4

          7         2     15     30

2  x   –– =   –– x –– = ––––

          15       1      7        7

7           2    7        14  

– x  2 = – x – = –––––

18         18  18     324

       1       7      7

7 x –– x  –– = ––

        8      1       8

 1          2   1      2

– x 2 = – x – = ––

9          9     9    81

       13     2      26

2  x –   x  – = ––––

      20     20     400

1          3     1        3

– x 3 = –  x –   = –––

30        30   30    900

        7        2      14

3  x ––  x –– = ––––

        24     24     576

817.

15                 3 x 5 x 7 x 2         30
___  x 14 = _________  =    ____
49                     7 x 7                  7



11                11 x 3 x 9         33
___ x 27 = _________ = ____
36                   9 x 4               4


            13         13 x 6 x 3   39

18 x   ____ =_______ = ___
            48          6 x 8          8


           
           35        7 x 5 x 4 x 6         30

24 x   ____ = ___________= ___
            56      7x 2 x 4           2



             7              5x 5x 7             35

25 x   ____ = __________ = _____
            30             6 x 5                  6





            11            11 x 4 x 8            44 

32 x   ____ = ____________ = ___
            48              6  x 8                 6

13                   13 x 2                  26
___  x 2 = ____________ = ____
15                    15                       15



7                      7 x 3 x 5           21
___  x 15 = _________ = ____
20                     5 x 4               4