II. .
1. .
,
.
- ?
,
.
,
? !
, .
, .
2. .
25 17 , 15 . ?
. , , , . , .
.
( )? (25 15 = 10.)
( )? (25 17 = 8.)
? (10 + 8 = 18.)
? (25 18 = 7.)
III. .
IV. .
V. .
:
) ;
) ;
) ;
) ?
) .
, 7 . 4 .
) , , :
| ? |
| |
| 7 4 | ||
| ? |
| |
| 7 3 | ||
| ? |
| |
| 4 3 | ||
| ? |
| |
| (7 4) 3 | ||
| ? |
| |
| 7 3 (4 3) | ||
) .
5 , 3 . 2 , .
) , , , , , .
) , :
1. ?
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2. ?
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3. , ?
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4. , ?
|
|
|
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5. ?
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6. , ?
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VI. .
43
2
: ; ; .
I. .
II. .
1. ? (6.)
? (3.)
2. .
10 , . 33 , .
, ?
3. ?
.
6 (10 2 2 = 6).
15 (10 + 10 5 = 15).
15 (10 + 5 = 15).
2 .
