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    1 c2 = 100 2                         1 a = 100 2

  1 2 = 100 c2                     1 = 10 000 2
  
1 2 = 10 000 2                1 = 100 a

  1 2 = 100 2                            1 2 = 1 000 000 2
  1 2
= 10 000 c2                  1 2 = 100
  1 2 = 1 000 000 2

  :

a) 4 c2 = 400 2
    b) 1600 2 = 16 c2
    c) 14 2 = 1 400 2 = 140 000 c2
    d) 21 a = 2 100 2
    e) 3 = 30 000 2
    f) 670 000 2 = 67
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1. 12, 12, 1 a, 1 , 1 2, 1 2. .

2.  : - 2671 2,  -  9892,    - 198 2 . :
a) 2 , ? 
b) :
   - 2 671 2 = ...............................
    -  989 2 =   ...............................
  -  198 2 =   ...............................

3. :

    12 2 =  .......... 2                        1 400 2 = ..........2
    8 2 = .......... 2                            230 000 2 = ...........2
    35 2 = .......... 2                            340 000 c2 = ............ 2
    35 2 = ............. 2                         600 2 = .......... a
    24 a = ........... 2                              560 000 2 = ............
    15 = ............ 2                            500 2 = ............... 2