' .
- .
" . ".
. (). ' . .
1. : 60: + 1 6; 0 ■ 7 + 700: 7.
2. : (50: 5) 3. II. .
1. . ( ) , ' 30 3, 200 4, 60: 3, 900: 3. ' .
1) , .
30 3 = 90
. -3 = 9 .
200 4 = 800
2 . -4 = 8 .
60: 3 = 20
6 .: 3 = 2 .
900: 3 = 300
9 .: 3 = 3 .
2) : 300 2.
2. (3 200) . .
- 3 20. : 3 20 = 20 3 = 60. : 3 20 = 3 2 10 = 60. 3 300 .
3. . . 1)2-4;9:3 10: 2 5-2
20 4 90: 3 100: 2 50-2
200 4 900: 3 1000: 2 500-2
2) 10, 20, 30, 300, 200 3 . 20, 60, 100, 200, 600 2 . Ͳ, .
1. . 70 . ³ . (. 107). ,
. 107
. . 䳿? 䳺? ' .
2. .
ʳ | ||||
10 | ? | |||
30 |
' . IV. ϳ.
. ' 3 䳿 .
, . , '.
12 . .
"ij . ij 80: 20, 600: , 600: 300".
. : 24: (3 2). .
24: (3 2) = 24: 6 = 4 '...
. 24: (3 2) = (24: 3): 2 = 8: 2 = 4
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? (24: 3 = 8). ? ( 䳿 2).
24 3 2, 24 3, 8 2, 4. ³ , . .
:
1. .
18: (2-3) 80: (4-2) 900: (3 3)
2. .
36: (9 2) 72: (3 8) 60: (10 2) 400: (10 5).
3. , .
48:16 72:36 80:40 64:16
. 54: 18 = 54: (9 2) = 6: 2 = 3.
80: 20, 600: 30, 600: 300 , . 182
VIII. 101-1000. 䳿 1000
' .
- .
" . ".
. (). ' . .
1. : 60: + 1 6; 0 ■ 7 + 700: 7.
2. : (50: 5) 3. II. .
1. . ( ) , ' 30 3, 200 4, 60: 3, 900: 3. ' .
1) , .
30 3 = 90
. -3 = 9 .
200 4 = 800
2 . -4 = 8 .
60: 3 = 20
6 .: 3 = 2 .
900: 3 = 300
9 .: 3 = 3 .
2) : 300 2.
2. (3 200) . .
- 3 20. : 3 20 = 20 3 = 60. : 3 20 = 3 2 10 = 60. 3 300 .
3. . . 1)2-4;9:3 10: 2 5-2
20 4 90: 3 100: 2 50-2
200 4 900: 3 1000: 2 500-2
2) 10, 20, 30, 300, 200 3 . 20, 60, 100, 200, 600 2 . Ͳ, .
1. . 70 . ³ . (. 107). ,
. 107
. . 䳿? 䳺? ' .
2. .
ʳ | ||||
10 | ? | |||
30 |
' . IV. ϳ.
. ' 3 䳿 .
|
|
, . , '.
12 . .
"ij . ij 80: 20, 600: , 600: 300".
. : 24: (3 2). .
24: (3 2) = 24: 6 = 4 '...
. 24: (3 2) = (24: 3): 2 = 8: 2 = 4
? (24: 3 = 8). ? ( 䳿 2).
24 3 2, 24 3, 8 2, 4. ³ , . .
:
1. .
18: (2-3) 80: (4-2) 900: (3 3)
2. .
36: (9 2) 72: (3 8) 60: (10 2) 400: (10 5).
3. , .
48:16 72:36 80:40 64:16
. 54: 18 = 54: (9 2) = 6: 2 = 3.
80: 20, 600: 30, 600: 300 , . 184
VIII. 101-1000. 䳿 1000
, : 80: 20.
, 80: 20 .
.
80: 20 = 80: (10 ■ 2) = (80: 10): 2 = 8: 2 = 4.
. 80 20. 20 10 2. 80 10 2, 80 10, 2 (80: 10 = 8, 8: 2 = 4). , 80: 20 = 4.
.
20 2 = 40 ( 2 ),
20 ■ 3 = 60 ( 3 ),
20 ■ 4 = 80 ( 4 ).
" ".
' .
. ij . 3 2 . 7 ?
':
: :
( + 2) 7 = 35 (.) 7 + 2 7 = 35 (.)
³. 35 . ³. 35 .
, 䳺 ' .
ϳ '.
(4 + 3) 9 = 7 ■ 9 = 63
(4 + 3) 9 = 4 9 + 3 9 = 36 + 27 = 63
. , . '■' " '
ϳ :
1. : (3 + 7) 4; (5 + 2)
2. : (5 + 7) ■ 4; (20 + 7) 3.
3. , : (2 + 7) ■ 4; (3 + 6) 5; (8+7) 3.
15 3. . .
. . : 21 ■ 4. 21 : 21 = 20 + 1. : (20 + 1) 4. ? :
(20 + 1) 4 = 20 4 + 1 4 = 80 + 4 = 84.
4, 80, , 4, 84.
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