SPS Math Diagnostic – Pre Grade 8 Answer Key
Contents
Place Value ..................................................................................................... Error! Bookmark not defined.
Decimals ......................................................................................................... Error! Bookmark not defined.
Fractions......................................................................................................... Error! Bookmark not defined.
Percent ........................................................................................................... Error! Bookmark not defined.
Parts of a Whole............................................................................................. Error! Bookmark not defined.
Integers .......................................................................................................... Error! Bookmark not defined.
Finding Numbers on a Number Line .............................................................. Error! Bookmark not defined.
Addition......................................................................................................................................................... 5
Subtraction.................................................................................................................................................... 6
Multiplication ................................................................................................................................................ 7
Division.......................................................................................................................................................... 7
Factors and Multiples.................................................................................................................................... 8
Order of Operations ....................................................................................... Error! Bookmark not defined.
Cartesian Plane ............................................................................................................................................. 9
Patterns ......................................................................................................................................................... 9
Solving Equations ........................................................................................................................................ 10
1
SPS Math Diagnostic – Pre Grade 8 Answer Key
Place Value
1. What is the value of the underlined digit?
a) 1986
900
b) 8721986
2. Fill in the empty spaces on the table
Standard Form
Expanded Form
20000
2000 + 400 + 50 + 7
In Words
Two thousand four hundred
fifty seven
167 089
100000+60000+7000+80+9
One hundred sixty seven
thousand eighty nine
3 206 951
3000000 + 200000 + 6000
+ 900 + 50 + 1
Three million two hundred
six thousand nine hundred
fifty-one
2457
3. Round the following numbers:
a) 384.58 to the nearest tenth
384.6
b) 6562.41 to the nearest
thousand
7000
2
SPS Math Diagnostic – Pre Grade 8 Answer Key
Decimals
1. Colour the blocks to show the
indicated decimal numbers:
a) 0.75
2. What decimal would describe the
shaded part of the diagram?
0.5
3. Use <, >, or = to make the
statements true:
a) 0.6 _ >___ 0.006
b) 42.18 __<__ 42.7
Fractions
1. What fraction would describe the
shaded part of the diagram?
3
2. Show in at least 3 different ways.
5
varied
5/10
3. Order the following fractions from smallest to largest.
a)
7
4
3
8
10
10
10
10
3/10, 4/10, 7/10, 8/10
b)
5
1
1
2
6
3
2
3
1/3, 1/2, 2/3, 5/6
4. Are the shaded fractions of the following diagrams equivalent? YES or NO
5. Give an equivalent fraction for each of the following:
a)
6
12
varied
b)
60
90
varied
3
SPS Math Diagnostic – Pre Grade 8 Answer Key
6. Circle the bigger fraction. If both fractions are equal, circle both.
a)
3
5
𝑜𝑟
4
b)
5
1
2
𝑜𝑟
1
3
7. Write a mixed number and an
improper fraction to describe the
shaded portion of the following
diagram.
3
c)
8. Change
1
3
4
Percent
1. Circle which test score is highest in
percent.
a) 7 out of 10
b) 15 out of 25
c) 40 out of 50
23
6
4
8
𝑜𝑟
1
2
to a mixed number.
5
6
2. What percent is shaded in the
following diagram?
52%
Parts of a Whole
3. Fill in the other ways to represent each number:
Decimal
0.04
0.62
0.03
Fraction
4
100
62
100
3
100
Percent
4%
Decimal
0.30
62%
0.09
3%
0.40
Fraction
Percent
6
20
9
100
40
100
30%
9%
40%
4. Give an example of a fraction larger than 0.5.
4
SPS Math Diagnostic – Pre Grade 8 Answer Key
Integers
1. Order the following sets of integers from smallest to largest -5, +9, 0, -1, -8, -6
__-8___, __-6___, __-5___, __-1___, __0___, __+9___
Finding Numbers on a Number Line
5
Place the numbers where they belong on the number line: 2, -1, , 40%, 0.9
2
-3
-1
0
40% 0.9
𝟓
2
𝟐
Addition
1. 12 + 9 = 21
8. 4.301 + 2.89 = 7.191
2. 63 + 295 = 358
9.
3. 3.0 + 2.0 = 5.0
4. 3.1 + 2.6 = 5.7
4
7
3
7
7
7
+ = 1 𝑜𝑟
1
5
6
6
3
10.4 + = 5
3
1
17
5
4
20
11. + =
5. 7.1 + 2 = 9.1
12. (-8) + (+12) = +4
6. $17.88 + $2.90 = $20.78
13.(+5) + (-10) =-5
7.
32.6
+0.4
14.(-6) + (-9)= -15
33.0
5
SPS Math Diagnostic – Pre Grade 8 Answer Key
Subtraction
1. 27 - 3 = 24
10.5000 − 122.4 = 4877.6
2. 607 – 32 = 575
11.4 − 1 = 2
3. 1465 – 348 = 1117
12.0 − 15= - 15
4. 6.0 – 5.0 = 1.0
13.3 – 10 = -7
5. 8.5 – 2.4 = 6.1
14.(+8) – (+6)=+2
6.
32.6
−0.4
1
2
7
4
3
12
15. (+2) – (-6) = +8
32.2
7. 7.1 – 3 = 4.1
$47.78
8.
−$31.65
16.(-8) – 9 = -17
17. (-4) – (-4) = 0
$16.13
9. 76.3 – 14.209 = 62.091
6
SPS Math Diagnostic – Pre Grade 8 Answer Key
Multiplication
1. 8 x 7 = 56
5. 86.9 x 7 = 608.3
2. 129 x 8 = 1032
6. 6 x 0.1 = 0.6
3. 25 x 48 = 1200
7. 0.01 x 5.88 = 0.0588
4.
7.6
× 5.8
8. 5 x 0.02 = 0.1
44.08
Division
1. 56 ÷ 8 = 7
2. 10
40
5.
3834
6
= 639
=4
6. 3 5.4 = 1.8
3. 9 81 = 9
7. 241.08  6 = 40.18
4. 8 400 = 50
7
SPS Math Diagnostic – Pre Grade 8 Answer Key
Factors and Multiples
1. What are the prime factors of 80?
You may use a factor tree if you
choose.
3. What is the greatest common
factor of 12, 15?
3
2X2X2X2X5
2. What are the factors of 12?
1, 2, 3, 4, 6, 12
4. What is the lowest common
multiple of 12, 15?
60
Order of Operations
1. 3 + 7 x 4 = 31
4. 2 – 3 (4)  6 – 2 = -2
2. 24 – 8 x 3 = 0
5. 5 + 7 (9 – 4 + 3) = 61
3. 4 x 8 + 8  4 – 3 = 31
6. 5 + 2 (8 – 4)  4 + 4 = 11
8
SPS Math Diagnostic – Pre Grade 8 Answer Key
Cartesian Plane
1. Write the (x,y) coordinates
for each point:
C
(2,2)
H (5, -6)
2. Which point is described by
the coordinates:
(3, -1) G
(-6, -1) D
Patterns
1. How many kilometers will Cindy
jog in 5 hours?
Hours
1
2
3
4
5
Kilometers
4
8
12
16
20
2. What is the pattern rule? 2x
Input
Output
23
46
25
50
9
18
47
94
3. Fill in the table for y = 2x + 1
x
y
1
3
2
5
3
7
4
9
4. Which of the following is an
example of an expression?
a. 2x + 4
b. 5x + 4 = 29
c. A = L x W
d. 12 + 6 =
36
𝑥
9
SPS Math Diagnostic – Pre Grade 8 Answer Key
5. Evaluate each of the following:
a. 38 m when m=5 190
b. 10y-5.6 when y=2 14.4
6. Study the graph below. What is the equation of the
line passing through the points marked on the graph?
3𝑥 + 2
12
11
10
9
8
7
6
5
4
3
2
1
0
0 1 2 3 4
7. What is the expression for
three times a number minus
five? 3𝑡 − 5
8. Ray earns money cleaning
windows. For each house he
charges $5 plus $2 for every
window cleaned. What is an
expression that represents his
total earnings? 2𝑤 + 5
Solving Equations
1. 34 =  + 9
25
2. 𝑥 + 5 = 11
𝑋=6
9. Which is the correct equation
for the following statement:
one more than double a
number is 11?
a. X + 1 = 11
b. 2x + 1 = 11
c. 2x = 11 + 1
d. X + 2x = 11
3. 3𝑥 = 12
𝑋=4
4. 2𝑥 − 3 = 15
𝑋=9
10