!
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%
)*'++
,#-'./*
11
3
11
3
;
3
5
3:9
3:15
9
15
;
11
3
3:33
3:9
33
9 −
=
−
−
=
−
;
3
5
9
15
=
95
60
19
12
−
=
−
456789:'
4567#8;3'
4567/<(=-
567#8;3'
!"#$%&'()*+%%,&'
$ * -( . /0 / $ 12 -3 4 56
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ba
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2019
1618
1416
3.23.2
22
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22
22
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−
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−
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dc
27/SGK
27/SGKĐố:
Đố:
6
10
=
6
6+4
=
1
4
12
15
=
7+5
7+8
=
5
8
-36
225
= =
-4.9
25.9
-4
25
2(4-7)
(4-7)+1
= 2
x
x
x
x
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