1. , .
2. ?
3. .
6 .
4. .
, . , 3 . , 2 . |
, 1 .
, 3 .
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II. ( , ).
1. . . , .
: 5 + 4 = 9 14 + 6 5 = 15 9 + 6 = 15
12 + 4 = 16 3 + 8 = 11 9 + 8 = 17
16 + 3 = 19 8 + 5 = 13 9 + 9 = 18
13 2 = 11 4 + 4 + 4 = 12
2. . 1, 5 10. .
5; 1; 10.
3 + 8 = 12 + 6 9 =
14 5 = 4 + 9 6 =
3. , . . . .
4. ?
+ + = . : 5 + 5 + 5 = 15.
+ + = . : 56 + 5 + 5 = 66.
5. . . .
) 4 + 7 = 11 ) 5 + 8 = 13 ) 8 + 9 = 17
11 4 = 7 13 5 = 8 17 8 = 9
11 7 = 4 13 8 = 5 17 9 = 8
6 + 5 = 11 6 + 7 = 13 9 + 5 = 14
11 6 = 5 13 6 = 7 14 9 = 5
11 5 = 6 13 7 = 6 14 5 = 9
6. . 11 .
11 = 10 + 1 11 = 6 + 5 11 = 2 + 9
11 = 9 + 2 11 = 5 + 6 11 = 1 + 10
11 = 8 + 3 11 = 4 + 7
11 = 7 + 4 11 = 3 + 8
. . 12, 13, 14.
7. .
, . , 5, 17. (7 + 8 + 3 = 18.)
III. .
1. .
2. 4 : 6, 8, 9, 7, 10. 3 : 10, 13, 11, 12, 9.
3. >, <, =:
11 3... 12 4 8 + 5 7 + 6
13 2... 15 6 9 + 7 8 + 8
4. 5 , 6 , , . ?
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: 20 , , .
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