ESTIMATION Estimation may be explained as a rough or sensible guess fo a value or calculation. Although, the estimated value is not correct, it gives us an idea of what the correct answer should be. The common units of length are kilometer (km), meters (m), centimeters (cm), millimeters (mm).Mass = (Tonne, kilogram (kg) gramme (g). […]
L.C.M AND H.C.F (LOWEST AND HIGHEST COMMON FACTOR) See also OPERATIONS ON FRACTIONS FRACTIONS FRACTIONS WHOLE NUMBERS ALGERAIC FRACTIONS
OPERATIONS ON FRACTIONS See also FRACTIONS FRACTIONS WHOLE NUMBERS ALGERAIC FRACTIONS ALGEBRAIC EXPRESSION
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FRACTIONS (CONVERTION FROM PERCENTAGE TO DECIMAL AND DECIMAL TO FRACTION) See also FRACTIONS WHOLE NUMBERS ALGERAIC FRACTIONS ALGEBRAIC EXPRESSION MULTIPLICATION AND DIVISION OF DIRECTED NUMBERS
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FRACTIONS (TYPES OF FRACTIONS) See also WHOLE NUMBERS ALGERAIC FRACTIONS ALGEBRAIC EXPRESSION MULTIPLICATION AND DIVISION OF DIRECTED NUMBERS APPROXIMATION AND ESTIMATION
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WHOLE NUMBERS See also ALGERAIC FRACTIONS ALGEBRAIC EXPRESSION MULTIPLICATION AND DIVISION OF DIRECTED NUMBERS APPROXIMATION AND ESTIMATION ARITHMETIC
ALGERAIC FRACTIONS To add or subtract fractions with different denominators, first change them to equivalent fractions. This is done by finding the L C M of the denominators Example1: Simplify 2a/5 + 4a/3 Solution: The L C M is 15 6a + 20a/ 15 = 26a/15 Example 2: Simplify 3/5x + 1/2x – 1/4x Solution:
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ALGEBRAIC EXPRESSION See also MULTIPLICATION AND DIVISION OF DIRECTED NUMBERS APPROXIMATION AND ESTIMATION ARITHMETIC FRACTIONS HIGHEST COMMON FACTOR AND LOWEST COMMON FACTOR
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MULTIPLICATION AND DIVISION OF DIRECTED NUMBERS Revision on addition and subtraction of directed numbers Note that: (a). + + = + OR – – = + (Replacing the same signs that apprear together by a positive sign (b). + – = – OR – + = – (Replacing two different signs that appear together by
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APPROXIMATION AND ESTIMATION (SIGNIFCANT AND DECIMAL PLACES) SIGNIFICANT: TO ROUNDOFF A NUMBER CHANGE 0,1,2,3,4 TO 0 WHILE 5,6,7,8,9 TO 1 AND ADD IT TO THE NEXT NUMBER Example 1: round off 492.763 to (a) 3 s.f (b) 3 s.f (c) 2 d.p (d) 4 d.p Solution: (a). 492.763 = 49 (since the third number is
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