(. 66), , .
: . , .
I | II | III | IV | V | |
. | 105 | 110 | 125 | 140 | 155 |
105 | 115 | 130 | 145 | 155 |
3* (. 67)
, :
1. .
2. .
3. .
.
(1). ( ), 2.
(4- ) , (1- ) , 3- , 2- .
1 (. 66)
5 700 - 1 500 = 4 200
3 + 2 300 = 5 300
4 700 - 600 = 4 100
1 300 + 1 500 = 2 800
2 (. 67)
4 (. 67)
) (900 - 548) + (354+ 922) = 1628;
) 142 3 - (300 - 124) = 250;
) 900: 3 + (200 - 154) = 346.
5 (. 67)
1) 480: 3 = 160 (/);
2) 420:2 = 210 (/);
3) 210-160 = 50 (/).
7. : . 67 6
6.
36 4 25 = 36 (4 25) = 36 100 = 3600
125 15 4 = (125 4) 15 = 500 15 = 7500 . .
: .
: , , ; .
2.
, . 3 .
38: 19 + 420:7 =
16 6:3 + 200 =
28:2 3 + 400 =
3 (720 - 600) =
4(660-560) =
(140-60) 5 =
:
8 53 =...
1 937 =... ... ...
534 =... ...
4 230 =...
250 =... ...
7 5 =...
6 520 =... ...
904 =
82 =
360 =
:
) 100 , 4 . ?
) 1 600 . 1 (2, 10) ?
) 500 , 500 . ?
6* (. 69)
:
1) 6 8:
6-8;
2) 4 6:
4+6.
. .
6-8 | 4 + 6 | ||
6 1 - 8 | 41 + 6 = 10 | ||
62-8 = 4 | 42 + 6 = 14 | 4* 14 | |
63-8 = 10 | 43 + 6 = 18 | 10*18 | |
64-8=16 | 44 + 6 = 22 | 16*22 | |
65-8 = 22 | 45 + 6 = 26 | 22*26 | |
66-8 = 28 | 46 + 6 = 30 | 28*30 | |
67-8 = 34 | 47 + 6 = 34 | 34 = 34 |
: 7 .
|
|
2 (. 68)
20 000 000 8 , .
200 000 000 9 , .
3 (. 68)
) 3 200 305; , II, IV V ( , );
) 25 605 000;
) 5 000 600.
4 (. 69)
1 (. 68)
90 .
5 (. 69) -
7 (. 69)
I.
1) 840: 8 = 105 () ;
2) 840 - 105 = 735 () ;
3) 735: 3 = 245 (.) .
II.
1) 840: 8 7 = 735 () ;
2) 735: 3 = 245 (.) .
8 (. 69)
53 .
9 (. 69)
) (5460 + 540) + 400 = 6400;
) (800 - 482) + 182 = 500;
) (720 + 180): 2 = 450;
) - 60 = 150; = 210.
1. .
2. .
3. .
1 10
1 1 000
1 10
1 10
100
4. .
7 25
7 250 725
12 300 12 300
120300
5. 3 4 .
3 40 3 400
34 340
3040 3 4 3 400
340 340
: .
: ; .
2.
, , :
:
) 900 , 10 . , ?
) 10 640 . 5 ?
) 500 3 7 , . ?
) : , , , , , , , , , . . ?
|
|
7 (. 71)
7 55 .
9 (. 71)
635 6 ;
1075 10 ;
1762 17 .
11 (. 71)
167 - 56 2 = 55 ().
5* (. 70)
, . :
0
= 6, 6 + = 9, = 3.
: 360, 36.
:
300 005, 7 096, 8 030 050, 2 003 070, 230 009, 20 760;
3 ?
1 000 247?
730 210;
125 2 ;
340 460;
, 790 360;
1 60.