2 (. 90) -
. :
) 51 26 , 26 51. 25, 25 + 26 = 51; 51-26 = 25;
) 51 , 51: 51 - =, + = 51 . .
5 (. 91)-
. :
) . , . ?
) . , ?
) . , . ?
3 (. 90)
. .
1 (. 90)
- = 385 - 160 = 225 ()
- = 400 - 132 = 268 ()
4 (.90)
710 - = 71;
= 639.
7 (. 91)
, .
_____________________
_________________________________
385 - 250 - 75 = 60 (),
385 - (250 + 75) = 60 ().
8 (. 91)
5 , 8 . (5 + 3 = 8.) , .
1 = 5 4 = 20 ()
S 1= 5 5 = 25 (2)
32-20 = 12 ()
2 = 8 4 = 32 ()
S 2= 8 8 = 64 (2)
64-32 = 39 ()
7. : 9, 10 (1 .), . 91
:
: ; .
2.
:
5 =... 697 =... ...
5 =... 890 =... ...
8 =... 3 5 =...
8 =... 35 =... ...
360 =... 4697 =...... ...
6 (. 93)
40 40. 40, 80 ( 40, , 40, ).
?
:
) 400 . 150 , 110. ?
) 20, 10 , . .
) 20 . .
5 (. 93)
.
. ) ) ).
1 (. 92)
|
|
|
S = 90 40 = 3600 (2);
= (90 + 40) 2 = 260 ().
3* (. 93)
= 2( + );
= 1708;
1708: 2 = 854 () ( ). .
(854 + 58): 2 = 456 () .
8 (. 93)
S = .
1) S = 24 2, = 6 , = 24: 6 = 4 ();
2) S = 24 2, = 4 , = 24: 4 = 6 ();
3) = 6 , = 4, S = 64 = 24 (2).
2 (. 92)
18 10
360 ?
18 360 ?
360: 18 = 20 ().
, 20 10 : 1020 = 200 ().
4 (. 93)
7 (. 93)
140; 730; 301; 48; 340; 166.
9 (. 93)
:
: ; .
2.
:
23045 84325 38008 40176
+ 2582480 + 524235
934 58 66 41
▪ 598364, 708002, 64030. .
▪ 30000, , .
▪ 600000, , .
▪ 5237., , .
▪ 284, 1000 .
▪ 740010, 10 .
▪ , 10 .
▪ 5 .
▪ ?
:
) 12 000 400 . ?
) 120 000., 5 150 000 . ?
) 20 , 900 /? 20 , 54 /?
3 (. 95)
: 100 , 150 , 500 , 600 .
4* (. 95)
. . :
1) 400 + 300 + 440 = 1140 (.) ;
2) 1140 : 2 = 570 (.) ;
3) 570 - 400 = 170 ();
4) 570 - 300 = 270 ();
5) 570 - 440 = 130 ()
1) 400+ 300 = 700 (.);
2) 700-440 = 260 (.) -
3) 260: 2 = 130 ().
.
