1. .
2. 4 . 2 . ?
3. .
4. , .
9 + 9 = 7 + 5 = 12 7 =
15 6 = 7 + 7 = 7 + 6 =
16 8 = 16 9 =
(.)
II. ( , ).
1. 34, 120, 217 .
34 = 
120 = 
217 = 
.
.
34 = XXXIV 120 = CXX 217 = CCXVII.
.
34 =ΔΔΔ | | | | 120 = ΗΔΔ 217 = ΗΗΔ | | | | | | |
.
34 = | | | 120 = ■ | | 217 = ■■ |
2. .
3. .
4. .
20 , ? (19, 18, 17, 16, 15, 14, 13.)
5. , 1, 5, 7. . ? (9 .)
15 51 71
17 57 75
11 55 77
6. 7 .
7 = 1 + 1 + 5 7 = 1 + 4 + 2 7 = 2 + 3 + 2
7 = 1 + 2 + 4 7 = 1 + 5 + 1 7 = 3 + 3 + 1
7 = 1 + 3 + 3 7 = 2 + 2 + 3 7 = 3 + 1 + 3
?
, , .
7. . . . , ?
8. .
3 + 7 = 10 6 + 7 = 13 9 + 7 = 16
4 + 7 = 11 7 + 7 = 14 10 + 7 = 17
5 + 7 = 12 8 + 7 = 15
III. ( ).
1. , ) 64, ) 79, ) 40, ) 125.
2. .
: ) 3, ) 4, ) 4, ) 5.
3. .
4. .
) 75 62 = 13 ) 36 25 = 11
) 87 33 = 54 ) 146 99 = 47
5. .
) (41 + 35) 33 = 76 33 = 43
) (61 + 17) 24 = 78 24 = 54
) (34 + 36) 21 = 70 21 = 49
) (35 + 18) 37 = 53 37 = 16
. 10 , , . , ? () 2 ; ) 5 ; ) 0 ; ) 7 .)
IV. .
|
|
|
? ?
? (10.)
17
20
: ( 20 ), ; 20 .
.
: 20 , 20 , , .
: , , .
( / ): : ( , ); : , ; , , ; : ; , , .
