II. .
1. , .
2. :
) 13, 15, 19, 25, 33, , , ;
) 81, 84, 80, 83, 79, , , ;
) 9, 12, 16, 21, 27, 34, , , .
3. .
. 6 , 8 . ?
4. , .
III. .
9.
IV. .
17 (. 45).
. ? ?
? ?
:
| 1 | ||
| ? . (.) | 9 . | 5 . |
| 8 . | ? . |
:
1) ?
45: 9 = 5 (.).
2) 8 ?
5 8 = 40 (.).
: 40 .
18 (. 45).
.
? ?
:
| 1 | ||
| ? . (.) | 9 . | 36 . |
| 7 . | ? . |
:
1) 1- ?
36: 9 = 4 (.).
2) ?
4: 7 = 28 (.).
: 28 .
V. .
1.
, :
9 5 8 4 7 4
9 6 6 8 5 4 7 3 + 3
9 4 + 9 8 3 + 8 7 3 + 7
9 6 9 8 5 8 7 5 7
2.
?
9 3 9 4 9 2 3 9 4 9 2 9
|
|
| |||||||||
3.
, :
8 4 8 5 + 8 8 8 8 8 4 + 8 8 2
4.
, , . ?
16, 24, 32,
8 2, 8 3, 8 4,
2 8, 3 8, 4 8,
VI. .
|
|
|
?
?
: , 80.
82
7, 8, 9
: 7, 8, 9; , .
I. .
II. .
I
1. .
9 ∙ □ + 8 = 53 9 ∙ □ + 38 = 92
9 ∙ □ + 30 = 75 9 ∙ □ 19 = 35
9 ∙ □ 8 = 37 9 ∙ □ + 7 = 61
9 ∙ □ + 18 = 63 9 ∙ □ 5 = 49
9 ∙ □ 27 = 18 9 ∙ □ + 6 = 60
2. , .
9 ∙ 2 = 9 □ 9 9 ∙ 5 = 9 □ 4 □ 9
9 ∙ 2 = 27 □ 9 9 ∙ 5 = 9 □ 18 □ 18
9 ∙ 3 = 9 □ 9 □ 9 9 ∙ 6 = 50 □ 4
9 ∙ 3 = 20 □ 7 9 ∙ 6 = 9 □ 5 □ 9
9 ∙ 4 = 9 □ 3 □ 9 9 ∙ 7 = 9 □ 9 □ 9 □ 9
9 ∙ 4 = 9 □ 5 □ 9 9 ∙ 7 = 70 □ 7
3. .
3 . 9 ?
4. , .
5. : 40, 25, 50.
II
1. .
9 ∙ □ + 6 = 51 9 ∙ □ + 7 = 61
9 ∙ □ + 9 = 54 9 ∙ □ 5 = 49
9 ∙ □ + 19 = 64 9 ∙ □ + 8 = 62
9 ∙ □ + 29 = 74 9 ∙ □ 6 = 48
2. , .
9 ∙ 2 = 48 □ 30 9 ∙ 5 = 81 □ 47 □ 11
9 ∙ 2 = 9 □ 3 □ 9 9 ∙ 5 = 9 □ 7 □ 18
9 ∙ 3 = 9 □ 2 □ 9 9 ∙ 6 = 9 □ 7 □ 9
9 ∙ 3 = 50 □ 23 9 ∙ 6 = 63 □ 9
9 ∙ 4 = 9 □ 5 □ 9 9 ∙ 7 = 9 □ 8 □ 9
9 ∙ 4 = 20 □ 16 9 ∙ 7 = 9 □ 6 □ 9
3. .
9 . 4 ?
4. , .
5. : 42, 36, 60.
83
.
: ; ; .
