ChApTeR 1....
Chapter 1: Directed Numbers
1.1 Multiplying Integers
Multiplication of an integer with positive integer is the repeated addition of the integer.
For your information, these are the rules for multiplication of integers:
- (+) x (+) = +
- (+) x (-) = -
- (-) x (-) = +
- (-) x (+) = -
*Remember: Any number multiply by 0 is equal to 0.
Example:
40 x 2 = 80
-4 x 15 = -60
(-20) x (-5) = 100
13 x 0 = 0
This is easy, right?
Now, let us go through Dividing Integers!
Division of an integer with a positive integer is a process of equal grouping or sharing and the division of a negative integer as well.
- (+) ÷ (+) = +
- (+) ÷ (-) = -
- (-) ÷ (-) = +
- (-) ÷ (+) = -
*If 0 divided of any of the numbers, there is always be 0! But remember, any numbers divided by 0 is undefined!!
Example:
50 ÷ 5 = 10
60 ÷ (-3) = -20
(-100) ÷ 4 = -25
(-81) ÷ (-9) = 9
Thats all for this chapter. We will study for new chapter for next lession.
Tutorials (1) :
1. Calculate each of the following:
a) 2 x 4 x 8 =
b) 5 x (-3) x 8 =
c) (-6) x (-5) x 3 =
d) (-7) x 3 x (-2) =
e) (-6) x (-3) x (-4) =
f) 42 ÷ 6 =
g) (-27) ÷ 3 =
h) 63 ÷ (-9) =
i) (-56) ÷ (-7) =
j) 0 ÷ 8 =
k) 0 ÷ (-6) =
