II. .
1. ?
? (5.)
? (4.)
2. :
3. .
25 , 35 , 30. , ? , ?
, ?
) 25 + 30 | ) 35 + 30 |
) 25 + 30 + 35 | ) 30 25 |
III. .
.
20 + 50 | 70 + 10 | |
40 + 30 | 36 + 23 | |
54 + 22 | 40 + 50 | |
60 + 20 | 60 + 30 |
.
.
IV. .
1. 1.
, .
(5 + 7) + (5 + 2) = (5 + 5) + (7 + 2) = 10 + 9 = 19
? (12.)
? (7.)
2. 2.
.
(5 + 4) + (5 + 3) = (5 + 5) + (4 + 3) = 10 + 7 = 17
(8 + 3) + (2 + 6) = (8 + 2) + (3 + 6) = 10 + 9 = 19
(10 + 2) + (10 + 3) = (10 + 10) + (2 + 3) = 20 + 5 =25
3. 3.
.
(20 + 6) + (30 + 2) = (20 + 30) + (6 + 2) = 50 + 8 = 58
, . (26.)
, . (32.)
? (26 + 32 = 58.)
4. 4.
26 + 32.
26 + 32 = (20 + 6) + (30 + 2) = (20 + 30) + (6 + 2) = 50 + 8 = 58
? ( 50 8 . .)
26 32 .
5. 5.
.
6. 6.
.
, .
:
1- 37 .
2- 41 .
? .
:
37 + 41 = 78 () .
: 78 .
? ( .)
7. 7.
. .
) 24 + 31 = 31 + 24 55 = 55 | ) 65 + 24 > 54 + 34 89 > 88 |
) 32 + 56 < 43 + 54 88 < 97 | ) 27 + 41 = 15 + 53 68 = 68 |
V. .
?
?
: .
|
|
38
: ; ; ; .
I. .
II. .
1. ? (6.)
? (3.)
2. .
10 , . 33 , .
, ?
3. ?
.
6 (10 2 2 = 6).
15 (10 + 10 5 = 15).
15 (10 + 5 = 15).
2 .