118. DISCUSS: The Power of Algebraic Formulas Use the Special Product Formula (A + B)(A – B) = A² – B² to evaluate the following products of numbers in your head. Make up more such products that you can do in your head. (a) 501· 499 (b) 79 ·61 (c) 2007 · 1993
Percentage
A percentage is a number indicated as a fraction of 100. It is a dimensionless number often expressed using the symbol %.
Algebraic Expressions
In mathematics, an algebraic expression consists of constant(s), variable(s), and mathematical operators. It is made up of terms.
Numbers
Numbers are some measures used for counting. They can be compared one with another to know its position in the number line and determine which one is greater or lesser than the other.
Subtraction
Before we begin to understand the subtraction of algebraic expressions, we need to list out a few things that form the basis of algebra.
Addition
Before we begin to understand the addition of algebraic expressions, we need to list out a few things that form the basis of algebra.
118. DISCUSS: The Power of Algebraic Formulas Use the
Special Product Formula 1A B2 1A B2 A2 B2
to
evaluate the following products of numbers in your head.
Make up more such products that you can do in your
head.
(a) 501 # 499
(b) 79 # 61
(c) 2007 # 1993
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