3 (. 62)
, .
: 25 = 2500 , , 25 < 2525 ; 40 025 > 4 (40 025 > 400 ) .
2 (. 62)
11 (. 63)
9 (. 63)
.
90-75:5 = 90-15 = 75
400 - 15 6 + 390 = 400 - 90 + 390 = 310 + 390 = 700
7 (. 63)
8* (. 63)
. (450: 3 = 150 /.)
.
. ________________________
. __________________ 150
I.
1) 150-30 = 120 (/);
2) 120: 2 = 60 (/);
3) 60 + 30 = 90 (/).
II.
1) 150 + 30 = 180 (/);
2) 180: 2 = 90 (/).
7. : . 63 10
: .
: ; .
2.
:
146 235 64:4
155 445 52:4
183 323 72:6
194 485 84:7
137 362 96:8
:
4 7 =...
66 =... ...
2 = 2 000...
120... = 2
30 = 3
7 = 70
3 000 =
48 =
6 (. 64)
(78-60): 2 + 4= 13;
78 - (60: 2 + 4) = 44.
:
) 3 . 1/5 . ?
) 3 . 3 , , 12 ?
) 1 100 . 1 ?
9 (. 65)
7 - 1 - 2 = 4 () .
5* (. 65)
1) 8-5 = 3 () ;
2) 3 2 = 6 () .
7 (. 65)
, D, D, D .
4.
1 (. 64)
15 . < 100 .
27 . < 87 . 8 .
85 . > 85 . 3 .
14 . = 140 .
300 . > 3000 .
20 . > 200 .
3 (. 64)
8 (. 65)
1/5 = 20
1/3 = 20
¼ = 25
6 = 360
½ = 5
12 (. 65)
2 (. 64)
(240+120):3 4 = 480
(570 - 249) 7 + 200 = 2447
4 (. 64)-
163:4=12 (/).
7. : . 65 10, 11
____________________________
0 1 000 000
1
.
|
|
|
24, 859, 2 001, 73 568, 3 480.
________________________
.
; .
____________________
3. 423 756 .
____
.
.
_________________________________________________________________
.
= _____ ;
. = _____
________________________________________
0 1 000 000
2
.
46 780, 35, 235, 38 594, 734.
_________________________________
.
; .
_______________________________________
735 972 .
________________________________________________________________
.
.
________________________________________________________
.
= _____ ;
.= ______
: :
ü ;
ü ;
ü ;
ü , ;
ü .
1. 408 000
2. , 12 460
3. , 899 901
4. 700 100
5. 60 5
6. 1/10 290
7. 490 70
8. , 1/5
9. 540 1 ,
10. 240 ?
:
: ; .
2.
18 20 =...
72 =...
6 =...
8 5 =...
3 =
16 2 =
7 =
12 =
500
400: 2 + 300
7 000 - 2 000: 10
1000 300: 2
100 6 - 120
3 400 - 700
900: 3 + 200
360: 2 + 320
840: 2 + 80
17 , 2 . ?
60 , 30 . 3 . ?
840 .
5 ?
10 , - . .
