1.6-4+8=          7-5+6=          1+6-4=          8-8=
 6-5+7=            7-6+5=          4+3-5=          7+0=
10-7+4=           9-2-5=           6+3-7=          17-10=
10-8+5=           9-4-5=           8+2-4=          4+10=
2.      10 ,  -   5  .
3.:
5.7        10.19            1+5.5+1           6.3        12.8          12-6.6+4
4.   (  )
   4  ,     3  .       ?
   :-5 ,-3 ,-4 .       ?
5. :
1  8 =                      1  5 =               6  2 =                 1  3 =
5  2 =                      4 5 =                5  9 =                  2 2 =
7  6 =                      9  3 =               6  =                         3 =
1  1 =                      8  8 =               7  1 =                  1  3 =
6.     1   4 ,  -  1  .
7.   (   )
   15   10 .     ,  ?
8.     ,     :
15, 20, 7, 17, 2, 13, 1, 9, 10, 6, 35, 44, 8, 11, 3, 9, 45, 7, 4, 36, 72.
9.      .
43= 40+3                            54=                                88=
67=                                     31=                                14=
98=                                     65=                                71=
32=                                     29=                                35=
10.  32, 66, 14, 79, 93, 47, 38, 80, 54, 1, 24, 5, 49   
11.:
13+525       1618-4       17-69      19-49      20-10.10        35-20 .50
12.   (  )
  5  , 2  , 3  , 1  .      6  .     ? (  )
     10  .     6  .      ?
13.    = 10 ,      = 2 , = 6 .          .
14.   (   )
  12 ,    7  .    ?
15.      .
34=30+4                             45=                                88=
76=                                     13=                                41=
89=                                     56=                                17=
23=                                     92=                                53=
16.  30, 60, 10, 70, 90, 40, 60, 80, 50   
17*.    = 10 ,      = 5 , = 8 .          .          
18.  .
  -             -                       -
 -              -                   -
 -               -                                      -
                  -                  -
     
19.  :
  5+2 = .+ 3          2+.=7+1        3+. = 2+5          5+4 = 6+.          8-3=.+5
20. ,     ,         .
21.   .
   5 + 3     2.  _____________________
   7 + 2      4____________________
  10 + 3     3_____________________
   8 + 2      6_____________________
   5 + 4      4____________________
  10 + 6     2_____________________
   9 + 2      5_____________________
22*. ,    3     .    ,   .    .
23.    .
16 ... 18         30 ... 25         50 ... 5        26 ... 62       42 ... 58
24.   ,    .
19, 15, 11, 14, 18, 16, 12, 17, 13.
25.   (   )
    8 .     ,   3 .   ?
   1  .    .     ?
26.
16-6+9=          25-5+3=         16-6+2=       13-3+4=
18-8+7=         15+3-10=        16+3-2=       19-3+50=
27.:
 3+55        68-4        7-66        9-49
28.   ,      3 ,    2  4 ,    - 6  6 .    ?
29.  .
1  =                                     1  3  =       
1 4 =                               7 =        
1  3  =                            1  8  =        
1 9  =                              1   2 =         
30.  .
30+20-40=                 3+2-4=                   80-60+40=                 8-6+4=
60-30+50=                 6+3-5=                   60-20+50=                 6-2+5=
20+70-60=                 2+7-6=                   90-20-40=                  9-2+3=
31.   (  )
    4      5    .       ?
   ,   .       ?
32.      ( 4 )
5, 9, 4, 8, ______________________________________
2, 7, 3, 8, ______________________________________
35, 45, 25, 35  __________________________________
62, 61, 64, 63___________________________________
33*.   ,       5.
__________________________________________________________________
   6,9,1    (     )_______________________________________________________
34.   (  )
   10   ( ),    4 .      ?
35.   1  6    4 .  ,            ,  ,  .
36.
7+3+6=                    8+2+5=                      6+4+3=                   14-4-6=
9+1+7=                    17-7-2=                     16-6+3=                  11-1+8=
37.   (  )
  9 ,   4  ,   .    ?
38*.   4,8,0    (    
)_______________________________________________________
39.   ,      2 ,    1  5 ,    - 6  .    ?
40.   (  )
   3 ,    6 .     ?
41.:
10+310+5              10+418-1             10+618-8               10+913+2
10-310-5                10+710-4             7+317-3                 12+419-4
8-34+3                   17-43+4               19-33+3                 15-45+4
42*.      -
92                       87                    14                  23 
44                       50                    67                  90 
11                       88                    70                  74 
43.   (  )
   2 ,     10  .     ?
   5 ,     6  .     ?
44.      ( 4 )
3, 9, 2, 8, ______________________________________
2, 7, 3, 8, ______________________________________
45.   (  )
  6 ,    4 .    ?
46. 5  ,        ,    .   .
47.  12, 77, 62, 89, 60, 20, 44, 65, 2, 36, 84, 30, 19, 58, 90 
    - ________________________________________________
   - _______________________________________________
48. ,     ,         .
49.       .
      .
      .
      5.
50.   (  )
  6 ,   2  ,   .    ?
  14 .   4 ,  .     ?
51*.    = 10 ,      = 5 , = 8 .          .
         .
         .
52*.  67  79, 84  44, 76  55, 32  34, 16  27, 98  89       :
53. 4 .            ,       .
54.   (  )
  4 ,   2  ,   .    ?
55.   ,      3 ,    2 ,   - 4 ,   1  .    ?
56.
6+4+2=                     28-20+1=                      16+3- 10=                    24-4+6=
19+1+7=                   17 -7+30=                     13+6+30=                    11-1+8=
57.   (  )
  28 .     18 .   ?
  4 ,    6 .      ,   ?
58.*   = 8 ,      = 2 , = 4 .          .
         .
         .
59.   .
   15 + 2     2. ____________________
   7 + 12      4____________________
  20 + 3     3_____________________
   38 + 2      6____________________
   5 + 74      4____________________
  80 + 6     2_____________________
   9 + 22      5___________________
60.   (  )
      5 ,   -  7  .      ?
61.    5 ,   4 .  ,      
     
62*.
93-70=                 89-6=                48+30=             78-20=               25+50=
67-30=                46+2=                 57-40=               29-7=               34+20=
70-50=                40+20=               90-70=               61-0=               50+1=
63.   ( )
  ,    .  :   ?
64.
30+20-40=             10+60+20=             50-10+20=             60-10-20=
20+40-10=             30+40+10=             90-70+20=             80-20-40=
70-50+30=             50+10-40=              30+40-50=            20+60-80=
65.   (  )
   .   2   ,    3  .     ?
    15 ,   2  ,    .      ?
66.  ,   3 .    8.
67.   13  12  4 _____________________________________
   14  15  9______________________________________
  17  15   7___________________________________
  20  10   5____________________________________
  19  3   3___________________________________
68.   (  )
  18 .      11.     ?
69*.    = 12 ,      = 4 , = 9 .          .
         .
         .
70*.     25  4,   ?
     16  2,   ?
     13  10,   ?
     50  20,   ?
71.   (  )
  12 ,    4  .    ?
  9      2   .    ?
   16  9 .    ,  ?
   16  ,   4  ,  .      ?
72.   3,    7 .  ,      
     
73. 4 .      ,           ,     ,       .
74*.   = 9 ,      = 3 , = 5 .          .
         .
         .
75.  (  )
   .     3 ,    12.      ?
76*.     16  3,   ?
     10  2,   ?
     24  4,   ?
     40  30,   ?
77.  ,   4 .    10  .
78.   1  8    7 .  ,     ,        ,  ,  .
79.
17-3+6=                    8+3+6=                     6-4+13=                    7-4-12=
19+1-7=                    7-7+20=                    16-8+3=                    11-1+8=
80.   (  )
  15    3 .      ?
   5 ,   4  ,  .     ?
   17 .    9    2 .     ?
  12 ,    3  ,   .    ?
  15 .   10 ,   .       ?
  12 ,   3  ,   .    ?
   12 ,    9 .     ?