Math 7 Lesson 1.2
Name: ______________________
NOTES: Multiplying Integers (RULES / MODELING)
RULES (https://www.youtube.com/watch?v=BE318-IyY5s)
Multiplying Integers
with Different Signs
Multiplying Integers
with the Same Sign
+
•
–
=
+
•
+
–
•
+
=
–
•
–
Find each product.
1. –5(4) _35
2. 6(–2) _54
=
=
3. (−3) (−3) _4
4. –12 · –2
MODELING
_
_
2 · (–3) or
–2 · 3
2 · (–4) or
4 · -2
Answer: -8
_
_
_
_
-6
-3
0
2 jumps by -3 or
2 rows of 3 negative counters
or
3 columns of 2 negative
counters
-6
2 rows of 4 negative counters
or
4 columns of 2 negative
counters
_
_
_
_
_
_
_
_
_
_
_
_
-4
-2
0
-8
-4
0
2 jumps by -4 or
-8
-6
-4
-2
0
Math 7 Lesson 1.2
Name: ______________________
Number Line
Videos:
https://learnzillion.com/lesson_plans/7858-multiply-two-positive-or-two-negative-integers-on-a-numberline#fndtn-lesson
https://learnzillion.com/lesson_plans/7975#fndtn-lesson
Find each product #1-19. Use all 3 methods #1-12 (even – rules, odd – modeling, multiple of 3 – number line)
1. –5(7)
2. 6(–9) _54
3. (−3)²_4
4. -12 · –2 · 0 · –125
0
5. 5(–11) _55
6. –15(–4) 60
7. –10 · 4 28
8. (−4)²
9. –18 · 2 _
10. –9(10) _90
11. 12(–6) _72
12. (–7)²
3
6
13. -4(-4)(5) 80
14. 6(-7)(2) _84
15. -10(-4)(-6) _
17. -9(4)(2) _72
18. 6(-4)(-12)(0) 28
4
0
16. -7(-3)(2) 42
19. The price of a stock decreased $2 per day for four consecutive days. What was the total change in value of the stock
over the four-day period?
Math 7 Lesson 1.2
Name: ______________________
HOMEWORK 1.2
1. Multiply using the rules from your notes.
a. 8(–8)
b. –3(–7)
c. –9(4)
d. 12(8)
e. (–4)²
f. –6(3)(–5)
g. –3(–4)(2) 80
h. 7(–1)(–5) _84
i. –6(–4)(2) _
j. –4(10)( –2) 42
k. –5(5)(2) _72
l. 6(–3)(–10)(0)
2. Use the number line to illustrate multiplying integers.
a. 5(-2)
b. -2(4)
c. -6(-2)
Math 7 Lesson 1.2
Name: ______________________
3. Use modeling to multiply the following integer problems.
4. Order the integers
in the set {14, |–3|, –10, |1|, –1}
from least to greatest.
(a)
(–7)  (–8)
(b)
6  (–4)
(c)
(–3)  9
(d)
57