earlier. Once the child is comfortable with the idea of a negative number, he/she may
understand the idea of additive inverse easily.
- Multiplication of integers
Two integers can be multiplied irrespective of their signs. When two integers with like
signs are multiplied then the product will be positive and when two integers with
unlike signs are multiplied, then the product will be negative.
The rule regarding multiplication of integers can be summarized as follows:
× Positive Negative
Positive Positive Negative
Negative Negative Positive
The idea needs to be explained with the above table prepared in Braille. Adequate
practice is needed to master the basic rules regarding multiplication of integers.
- Division of integers
As in the case of multiplication, division among integers can also be performed
irrespective of their signs. The rule regarding the sign of the quotient is also similar
as in the case of sign of the product. That is, when division is performed among two
integers with like signs then the quotient is positive, and when division is performed
among two integers with different signs then the quotient is negative.
Division among integers with different signs can be summarized as follows:
÷ Positive Negative
Positive Positive Negative
Negative Negative Positive
The concept of division among integers is to be explained with the above table
prepared in Braille.
