Post on 13-Dec-2015
description
Grade 9Number System
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Answer the questions
(1)Express the following numbers in the form of
p
q and reduce it to the lowest terms.
A) 0.2 B) 0.1 C) 0.5
D) 0.6 E) 0.7 F) 0.4
(2)Find 20 rational numbers between
-2
25 and
22
25 .
(3)Express the following numbers in the form of
p
q and reduce it to the lowest terms.
A) 0.5986 B) 0.38796 C) 0.93268
D) 0.6237 E) 0.71132 F) 0.94848
(4) Name the property that is reflected in the following expression:
A)
6
-24 X
-11
3 +
-14
-21 X
-11
3 =
-11
3 (
6
-24 +
-14
-21 )
B) -11
12 X
8
-18 +
-7
13 X
8
-18 =
8
-18 (
-11
12 +
-7
13 )
(5) Write the rational number that are equal to their reciprocals.
Choose correct answer(s) from given choice
(6) Choose an irrational number among the following :
a. b. -25
c. 25 d.
(7) If a and b are rational numbers such that , than the possible values of a and beare :
a. a = , b = b. a=0, b=0 OR a = , b =
c. a=0, b=0 d. a = , b =
ID : U-20048-5-2431-Number-System [1]
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(8) Regarding rational numbers:A. The quotient of two integers is always a rational number and
B. 1
0 is not a rational number
Which of the following statements is correct ?
a. A is false but B is a correct explanation of A b. A is correct and B is correct explanation of A
c. Both A and B are incorrect. d. A is correct but B is incorrect.
(9)If
1
-7 =
-3
X , then X = ___________
a. 14 b. -21
c. 21 d. None of these
(10) Which of the following is a rational number(s) ?
a. -11
-7 b.
5
-12
c. 0
12
d. All of these
(11)Is variable x in x2=
11
25 represents a rational or irrational number ?
a. Irrational b. Rational
(12) Which of the following statement is true ?
a. 6
-4 >
6
-5 b.
6
-5 >
-30
25
c. 6
-5 =
-30
25 d.
6
-5 <
-30
25
(13) The value of is
a. 0 b. 2.828
c. 8 d. 1
ID : U-20048-5-2431-Number-System [2]
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Fill in the blanks
(14) Find the following and simplify it to lowest term:
A)
-6
19 X
-7
2 X
-1
14 =
B)
-5
7 X
-9
22 X
-2
24 X
-3
10 X
5
21 =
(15)The decimal form of a rational number is either or .
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ID : U-20048-5-2431-Number-System [3]
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Answers
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(1) A) 2
9
B) 1
9
C) 5
9
D) 2
3
E) 7
9
F) 4
9
(2)
-1
25 ,
0
25 ,
1
25 ,
2
25 ,
3
25 ,
4
25 ,
5
25 ,
6
25 ,
7
25 ,
8
25 ,
9
25 ,
10
25 ,
11
25 ,
12
25 ,
13
25 ,
14
25 ,
15
25 ,
16
25 ,
17
25 ,
18
25
(3) A) 5927
9900
B) 19379
49950
C) 3727
3996
D) 2077
3330
E) 23687
33300
F) 47377
49950
(4) A) Distributive Property
B) Distributive Property
(5) 1, -1
(6) d.
(7) c. a=0, b=0
(8) a. A is false but B is a correct explanation of A
(9) c. 21
(10) d. All of these
(11) a. Irrational
(12)c.
6
-5 =
-30
25
(13) c. 8
(14) A)-3 38
B)15 8624
(15)repeating terminating
ID : U-20048-5-2431-Number-System [4]
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