1. Welcome to the
world of the
Avengers!!
Strategic Intervention Material in Mathematics G7
Directed by:
Mr. RONALD A. REALIZO
Teacher II
SAN SALVADOR HIGH SCHOOL
4. I’LL Take this
Remember this as your
weapon! Multiplication of
integers is similar to
multiplication of whole
numbers (both positive)
EXCEPT the SIGN of the
of the product needs to
be determined.
5. For our first attack, when
multiplying integers, two
POSITIVE integers just
REMEMBER THIS:
POSITIVE x POSITIVE=
POSITIVE
6. I think it is much
better to show them
how.
Come, I’ll show you!
For Example Dude!
3 x 10= 30
7 x 6= 42
12 x 7 = 84
15 x 3 = 45
10 x 10 = 100
20 x 6 = 120
Just follow the rule:
POSITIVE x POSITIVE = POSITIVE
(+) x (+) = (+)
7. I believe your now ready
for our next attack!
If you encounter two
NEGATIVE integers just use
this skill, when multiplying
two NEGATIVE integers the
product is also POSITIVE.
REMEMBER this formula:
NEGATIVE x NEGATIVE=
POSITIVE
HERE’S THE PLAN:
(-9) x (-5) = 45
(-10) x(-10) = 100
(-12) x(-3) = 36
(-20) x (-4) = 80
(-7) x (-11) = 77
Just don’t forget the
RULE:
NEGATIVE x NEGATIVE=
POSITIVE
(-) x (-)= +
8. I believe your now ready
for our next attack!
If you encounter two
NEGATIVE integers just use
this skill, when multiplying
two NEGATIVE integers the
product is also POSITIVE.
REMEMBER this formula:
NEGATIVE x NEGATIVE=
POSITIVE
HERE’S THE PLAN:
(-9) x (-5) = 45
(-10) x(-10) = 100
(-12) x(-3) = 36
(-20) x (-4) = 80
(-7) x (-11) = 77
Just don’t forget the
RULE:
NEGATIVE x NEGATIVE=
POSITIVE
10. going to do it…
When you encounter positive and negative
integers just multiply them but we need this
RULE:
POSITIVE x NEGATIVE= NEGATIVE
Look at this matrix:
8 x (-5) = - 40
(-13) x 3 = - 39
(-6) x 9 = -54
(-14) x 2= - 28
9 x (-9) = 81
We believe you’ve learned the techniques!
Now get ready for your own battle! Good
Luck Grade 7
12. 1. -12 x -12=
2. 40 x -4=
3. 20 x 20=
4. 13 x -11=
5. 9 x -20=
The first
battle is
easy try
do it,
remem
ber the
rules
Direction: Multiply the integers. Indicate the
correct sign
If you get:
0 mistake= Outstanding
1-2 mistake= Very
Satisfactory
3-4 Mistakes= Satisfactory
5 mistakes= Try again
14. CHALLENGE: In Mathematics LCD is an acronym for Least Common
Denominator. LCD has another meaning in Information Technology. Fill in the
table below with the letter corresponding to the product to reveal the other
meaning of LCD.
L
-24 8 12 16 8 -9
X - 4 X -12 X 12 X -5 X -12 X -9
C
9 12 30 13 15 16 12
X-7 X -12 X-2 X 3 X -3 X-4 X -7
D
-9 -8 -10 12 14 16 20
x -9 x12 X 9 x 4 x -7 x-4 x-5
DECODER
A -64
C -63
D 81
E 20
F 80
I -96
L 84
P 78
Q 144
R -144
S 39
T 45
U -80
Y-100
15. I’m glad that
you’ve come
this far, I
believe this
test will be just
easy for
you…Good
luck!
16. Go dude,
supply the
squares of
the
multiplicati
on table
with the
correct
answer, just
remember
the rule of
signs, You
can do it!
