A surd can be described as a root whose exact value cannot be found. It is an example of an irrational number; a number which cannot be expressed in the form: In getting the value of a surd, the decimal
Expansion of Algebraic Expressions Earlier, you read that: a(b + c) = ab + ac Example 1 Expand (2x – 3)(3x + 4) = 2x(3x + 4) – 3(3x + 4)= 6x2 + 8x – 9x -12= 6x2 – x – 12
A square is the result of multiplying a number by itself. Squares by Multiplication Find the Square of a) 3 , b) 14 , c) 245 a) 32 = 3 x 3 = 9b) 142 = 14 x 14 = 196c) 2452 = 245 x 245
A decimal is a fraction whose denominator is a power of 10. Express as decimal a) Express the following fraction as a decimal ⅜ Express decimals as fractions a) Express the following decimal as a fraction 0.355 b) Express the
Addition and Subtraction It should be noted that:a) + – = –b) – + = –c) – – = +d) + + = + As a student, please try: ( For this questions, please draw a number line as the one shown above from -14 to +14 )i) 4 + 8ii) -4 + 8iii)
When two numbers are multiplied to get a third number, the two numbers are factors.Consider: a x b = c , a and b are factors of c. c is referred to as the Multiple.A composite number is a number with more than two factors. Factors of Composite numbers a) Write
Place value of digits in numbers helps in reading and performing arithmetic operations.Example 1: A place value chart is show below: 56, 894 Hence the amount in words will be, fifty six thousand, eight hundred and ninety four. Example 2: Use the 875,
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