18301981 Chapter 1 Directed Numbers
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Transcript of 18301981 Chapter 1 Directed Numbers
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8/6/2019 18301981 Chapter 1 Directed Numbers
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Module PMR
CHAPTER 1 : DIRECTED NUMBER
A. Complete the following multiplication table.
x -8 -6 -4 -2 0 2 4-8
-6 36 -12
-4
-2
0 0
2 -16
4 16
B. Solving problems involving Combined Operations.
Example :-1 + 2 (- 3)= -1 + 2 + 3= 1 + 3= 4
1) 3 + ( - 3) ( - 5) 2) -18 3 + 5 ( - 6 )
3) 12 + 34 + (- 25 ) 15 4) -2 (- 5 )+( -4 )+(- 6 ) 5) -7 + 3 (- 2) + ( - 2 )
6) -13 (- 4 )+(-5) (-3) 7) 30 + 21 (-34 ) 8) -12 (-4 ) + 5 +(- 6 )
9) 5+( -3 ) ( -4 )+ (- 4 ) 10) - 8 - ( -3 ) + ( - 3 ) 11) - 3 + 2 - (-2) + (- 3)
12) 23 + 2 (- 3 ) + (- 4) 13) 5 + 3 (- 4 ) 14) CCC000 5)3(2 +
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Module PMR
15) 14 (- 12) + (- 23) 16)-100 + (- 234) ( -34)
17) -2 (-3) + (-4) + 5
18) -12 + (-23) (- 3) 19)4 ( -3) + (- 6 ) + ( - 2 )
20) -5 + (- 3 ) ( - 4)
21) 42 3(5 + 3 x 4) 22) 45 3( 2 + 3 x 5) 23) 45 4 ( 2 8 4 )
24) 36 + 4(3 -2 2) 25) -20 + 3( -3 - 4 x 5 ) 26) -45 2( -5 + 3 x 3 )
27) ( 4 2 3) + 3 4 28) ( -2 -3 x 4) 3 + 4 29) ( - 4 5 x 3 ) + 4
30) (3 2 x 3)4 + 34 31) ( 5 6 3) 4 3 32) (-6 +3x 4)8 + 3 7
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Module PMR
Common Errors
No Errors Correct Steps
1 (-2) + (-3)- (-4)
= -2-3-4=-9
=(-5)+4
= -1
2 (-4)x 9 (5)=-36 +5= -31
-36-5=-41
3 3
1+
5
2x ( -
3
10)
=155 +
156 x (-
1310 )
=15
11x (-
13
10)
=39
22
3
1+
5
2x ( -
3
10)
=31 -
134
=39
13-39
12
=39
1
4
-4 +
7
1
= -7
4+
7
1
= -7
3
-3
7
7+
7
1
= - 37
6
5 (-2.07x0.2) + 2.9= - 0.414 + 2.9=-0.604
=-0.414+2.9=2.486
6 (-7) x 8 x (-4)=(-56) x ( -4)= -224
= -56 x (-4)=224
7 (- 7
2) x (-
6
5) (-
3
1)
= -21
5+3
1
=(- 21
5
) + 21
7
= -21
2
21
5+
3
1
=21
5+
21
7
= 21
12
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Module PMR
Questions based on PMR format
1) Calculate the value
of 6.0 )21
531( + and
express the answer asa decimal.
2) Calculate the value of
-5.2 (- )101
81 + and
express the answer asa decimal.
3) Calculate the value of
10
7
)
8
5(5
3and
express the answer as afraction in its lowestterm.
4) Calculate the value
of )25.0(2
13 + x 4.2
and express theanswer as a decimal.
5) Calculate the value of
( )3
22
2
13
6
51 and
express the answer as afraction in its lowestterms.
6) Calculate the value of
)2.4(8
34 + x (-0.6) and
express the answer indecimal
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Module PMR
7) Calculate the value
of ( )3
21
6
12 x
7
21
and express your
answer as a fraction inits lowest term.
8) Calculate the value of
)13.2(4
31 + x (-0.4) and
express your answer in
decimals.
9) Calculate the value of
4
11 x )
4
3
5
21( and
express your answer as
a fraction in its lowestterm.
10) Calculate the value
of
3
11
5
21
4
11 and
express your answeras a fraction in itslowest term.
11) Calculate the value
of7
51
7
4
5
31
and
express the answer as afraction in its lowestterm.
12) Calculate the value
of
2
1
4
11
4
32 and
express the answer as afraction in its lowestterm.
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Module PMR
13) Calculate the value
of4
11
8
13
8
3 and
express your answer
as a fraction in itslowest terms.
14) Calculate the value
of
3
21
4
13
12
51 and
express your answer asa fraction in its lowestterms.
15) Calculate the value
of -0.25 -
+
8
1
5
1and
express the answer as adecimal in 2 decimalplaces.
16) Evaluate114 4 (14 + 54 9 )
17) Calculate the value
of 9
4
)027.0(8
1
64
3
and express youranswer as a decimal in2 decimal places.
18) Calculate the value
of 3
2
13
1
14
1
3
+ andexpress your answer asa fraction in its lowestterm.
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Module PMR
19) Evaluate
3.6 - [ 0.12 X (-6)]20) Calculate the value
of 19 (- 1.2) 8
3
21) Calculate the value
of
3
2
8
7
5
31 and
express the answer as afraction in its lowestterm.
PMR past year Questions
2004
1. Calculate the value of5
32
5
2
3
12
and express the answer as a
fraction in its lowest term.
[2m]
2. Calculate the value of -0.8 -
+
5
1
2
1and express the answer as a
decimal.[2m]
2005
3. Calculate the value of 96 3 (12 + 48 6 )[2m]
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Module PMR
4. Calculate the value of 4.26 0.8 -
2
11 and express the answer
correct to two decimal places. [2m]
2006
5. Calculate the value of 14 - ( )3
26.0 [2m]
6. Calculate the value of
32
54
811 and express the answer as a fraction
in its lowest term. [2m]
2007
7. Calculate the value of - 24 8 - 14 [2m]
8. Calculate the value of9.0
18.04[2m]
2008
9. Calculate the value of
3
1
5
3
2
5and express the answer as a fraction
in its lowest term.[2m]
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Module PMR
CHAPTER 1 : DIRECTED NUMBERSANSWERS
B. Solving problems involving Combined operations
Q A Q A Q A Q A
1 5 9 2 17 2 25 -89
2 -10 10 -8 18 -32 26 -53
3 6 11 -2 19 -1 27 -2
4 -7 12 24 20 -4 28 -13
5 -4 13 12 21 -9 29 -15
6 -11 14 6c 22 -6 30 22
7 85 15 3 23 45 31 9
8 -9 16 -300 24 44 32 44
Questions based on PMR format
Q1 -2.7 Q8 2.602 Q15 -0.18
Q2 -5.175 Q916
13Q16 34
Q37
4Q10 Q17 0.39
Q4 2.45 Q115
3Q18
4
32
Q511
5Q12
5
24 Q19 4.32
Q6 6.895 Q13
20
3Q20 22.2
Q714
9Q14
19
17Q21
3
1
Past year Questions
Q139
29Q4 4.91 Q7 -17
Q2 -0.5 Q5 14.9 Q8 0.8
Q3 36 Q6203 Q9
32
Directed Numbers 9
12
1