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5
1.
) 4
3; )
7
5;
) 5
8; )
12
1.
2.
. 10, 100, 1000, .
.
) 4,0104 = ) 13,2
100213
10013
100200
100132 ==+= ) 6,0
106
2523
53 ==
= ) 625,01000625
12581255
85 ==
=
3.
)19
12
17
6 , , .
4.
10
9
18
2 :
1 2
18
1
2
9
10
5 10
1
52
11
5
1
2
1=
==
)
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5.
x y .
a) 13 = xy ) 13 += xy
x = -2 , y = 7 x = -2 , y = 7 x = -1, y = 4 x = 0 , y = 1 x = 1
, y = -2 x = 2 , y = -5
7 = 3(-2) 1 7 = -3(-2) + 1 4 = -3(-1) + 1 1 = -30 + 1 -2 = -31 +
1 -5 = -32 +
7 = -6 1 7 = 6 + 1 4 = 3 + 1 1 = 0 +1 -2 = -3 + 1 -5 = -6 +1
7 = -7 7 = 7 4 = 4 1 = 1 -2 = -2 -5 = -5
! x )
)
6.
cma 6=
O = 3 a P =4
32a
O = 36 cm P = 22
394
336
4
36cm==
O = 18 cm
7.
cmr 3=
rO 2= 2rP=
= 32O 23=P
cmO 6=
2
9 cmP =
8.
g-
)
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9.
130 + 130 : 5 + 84(-1) = 130 + 26 + (-84 ) = 130 + 26 84 =
72
)
10.
4 4.
) 456 744 - 44 4 456 744 4
) 444 842 - 42 4 444 842 4
) 323 223 - 23 4 323 223 4
) 404 440 - 40 4 404 440 4
) )
11.
( ) CCCCC 6650165016 =+=
66
)
12.
) 18321 =++ xxx ) ( ) 313264 =++ xx
3
6
18
186
=
=
=
x
x
3
10
30
3010
13110
31110
313264
=
=
=
=
=+
=+
x
x
x
x
x
x
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13.
25 250 g
8 X g
25 : 8 = 250 : X
25X = 2508
X =25
8250
X = 80 g .
14.
a) 90
21
6990
9069
90
1
1
1
1
=
=
=+
=+
) 180
68
112180
180112
180
1
1
1
1
=
=
=+
=+
) 69= 211 =
) 112= 681 =
15.
48 : 1, 2, 3, 4, 6, 8, 12, 16, 24, 48
:
: 1, 2, 3, 4, 6, 8, 12, 16, 24, 48
:
= 72
14
2
86==
+ 7.
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:
48 :
= 4,1210
124
10
48241612864321==
+++++++++ : 12,4
16.
700 160
700 160 = 540 .
: 2 110 2110 = 220
115 = 15
380 = 240
540 , 22 +15+240 = 475 , .
540 ( 220 + 15 + 240 ) = 540 475 = 65 .
17.
( ).
:
aO = 3 -
cma
a
a
6
3
18
318
=
=
=
2
2
2
2
22
336
36
3
4
34
433
43
cmP
P
aP
aP
aaP
BP
=
=
=
=
+=
+=
)
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18.
242 cmM =
cmH 3=
cmr
r
r
Hr
7
642
3242
2
=
=
=
=
3
2
2
147
349
37
cmV
V
V
HrV
=
=
=
=
)
19.
t
sV =
min5
12
=
=
t h
kmV
5 = 5 60
1=
12
1
kmhh
kmtVs 1
12
112 ===
12h
km 5 1 km .
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20.
