Grade 8 Math Assignment
Unit 2: Multiplying & Dividing Integers
Name: ______________
Part A- Completion: Place the correct answer in the space to the right.
[15 marks]
1.
______
Write the repeated addition as multiplication:
(-7) + (-7) + (-7) + (-7) + (-7)
A.
B.
C.
D.
2.
What multiplication statement is modeled by the following?
A.
B.
C.
D.
3.
(-7) × (7)
(5) × (-7)
(-5) × (7)
(-7) × (-7)
______
(-5) × (3) = -15
(-3) × (-5) = 15
(3) × (-5) = 15
(5) × (-3) = -15
What multiplicative statement is modeled on the following number line?______
A.
B.
C.
D.
4.
(8)
(2)
(8)
(2)
x (-2) = -16
x (8) = 16
x (2) = 16
x (-8) = -16
Use these integers: –1, +6, –8, +3, –2
Which two integers have the smallest product?
______
A. -1 and -2
B. -8 and 6
C. -8 and -2
D. -1 and 6
5. A stock drops 42 points in 6 days. What integer represents the average
______
drop in points per day?
A.
B.
C.
D.
-252
-7
7
252
6. Divide:
A.
B.
C.
D.
−28
7
-21
-4
4
21
7. Replace
with an integer to make the equation true.
÷ (3) = 7
A.
B.
C.
D.
______
-21
-4
4
21
______
8. Evaluate:
−1 + 20 ÷ −5
______
9. Which operation must be performed first?
______
A.
B.
C.
D.
-5
-4
4
5
5 − 8 + 15 ÷ 3 × 4
A. −
B. +
C. ×
D. ÷
10. Evaluate:
A.
B.
C.
D.
16 − 4(−5)
-60
-36
36
60
11. Which multiplication statement equals (+24)?
A.
(-8) x (+3)
B.
(-4) x (-6)
C.
(+2) x (-12)
D. (+24) x (-1)
12. Which answer is -40?
A.
(-10) x (+4)
B.
(-10) ÷ (+4)
C.
(-4) x (-10)
D. (+4) ÷ (-10)
______
13. Which statement is ALWAYS TRUE about the product of two integers?
A. Greater than the two integers
B. Less than the two integers
C. Has the same sign as the greatest integer
D. Is positive when the two integers have the same sign
14. Which division statement has a quotient of (-6)?
A. (-24) ÷ (-4)
B. (-12) ÷ (+6)
C. (+18) ÷ (-3)
D. (+48) ÷ (+8)
15. What is the quotient between (-72) and (+9)?
A. -648
B. -8
C. +8
D. +648
Part B – Completion: Complete all questions. Show ALL workings.
(25 marks)
1. Use the number line provided to show the product of (-4) × (–3)
(3 pts)
2. Evaluate.
a)
c)
e)
3.
(6 marks)
(6)  (5)
(2)(14)(0)
b)
(20)  ( 4)
d)
(12)  (4)
f)
(15)  (5)
(30) × (−24)
Evaluate each expression. Show all workings.
a)
20  (5)  2
(2)
(12 marks)
b)
3  (15)  ( 5)
(2)
c)
30  (5)  (10)  2
(4)
d)
(4)(5)  [28  (4)]
(4)
5  (2)  1
4. How can you determine the sign of the product (−9)(+5)(−4)(−2)(−6)
without multiplying? Explain your thinking.
(2 marks)
5.
The temperature dropped 3 degrees each hour for 8 hours. Write an integer
expression to represent this situation and find the total change in temperature.
(2 marks)