# Mathematics (All Classes)

## ESTIMATION

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

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

OPERATIONS ON FRACTIONS   See also FRACTIONS FRACTIONS WHOLE NUMBERS ALGERAIC FRACTIONS ALGEBRAIC EXPRESSION

## FRACTIONS | CONVERTION FROM PERCENTAGE TO DECIMAL AND DECIMAL TO FRACTION

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

## FRACTIONS (TYPES OF FRACTIONS)

FRACTIONS (TYPES OF FRACTIONS) See also WHOLE NUMBERS ALGERAIC FRACTIONS ALGEBRAIC EXPRESSION MULTIPLICATION AND DIVISION OF DIRECTED NUMBERS APPROXIMATION AND ESTIMATION

## WHOLE NUMBERS

WHOLE NUMBERS See also ALGERAIC FRACTIONS ALGEBRAIC EXPRESSION MULTIPLICATION AND DIVISION OF DIRECTED NUMBERS APPROXIMATION AND ESTIMATION ARITHMETIC

## ALGERAIC FRACTIONS

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:

## ALGEBRAIC EXPRESSION

ALGEBRAIC EXPRESSION See also MULTIPLICATION AND DIVISION OF DIRECTED NUMBERS APPROXIMATION AND ESTIMATION ARITHMETIC FRACTIONS HIGHEST COMMON FACTOR AND LOWEST COMMON FACTOR

## MULTIPLICATION AND DIVISION OF DIRECTED NUMBERS

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

## APPROXIMATION AND ESTIMATION

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

## ARITHMETIC | SIMPLE INTEREST, PROFIT AND LOSS, DISCOUNT AND COMMISSION

HOUSEHOLD ARITHMETIC (SIMPLE INTEREST, PROFIT AND LOSS, DISCOUNT AND COMMISSION) PROFIT AND LOSS When a trader buys or sells goods, the price at which he /she sells is called selling price while the price at which he/she buys is called cost price. When the good is sold at a price greater than the cost price,

## FRACTIONS, RATIO AND PERCENTAGES

FRACTIONS (TYPES OF FRACTIONS), RATIO AND PERCENTAGES See also HIGHEST COMMON FACTOR AND LOWEST COMMON FACTOR WHOLE NUMBER AND DECIMALS NUMBERS SIMPLE EQUATIONS INVOLVING FRACTIONS MEASURE OF CENTRAL TENDENCY Data Presentation

## HIGHEST COMMON FACTOR AND LOWEST COMMON FACTOR

HIGHEST COMMON FACTOR AND LOWEST COMMON FACTOR See also WHOLE NUMBER AND DECIMALS NUMBERS SIMPLE EQUATIONS INVOLVING FRACTIONS MEASURE OF CENTRAL TENDENCY Data Presentation CHANGE OF SUBJECT OF A FORMULA

## WHOLE NUMBER AND DECIMALS NUMBERS

WHOLE NUMBER AND DECIMALS NUMBERS See also SIMPLE EQUATIONS INVOLVING FRACTIONS MEASURE OF CENTRAL TENDENCY Data Presentation CHANGE OF SUBJECT OF A FORMULA WORD PROBLEMS

## SIMPLE EQUATIONS INVOLVING FRACTIONS

SIMPLE EQUATIONS INVOLVING FRACTIONS See also MEASURE OF CENTRAL TENDENCY Data Presentation CHANGE OF SUBJECT OF A FORMULA WORD PROBLEMS ALGEBRAIC PROCESSES

## MEASURE OF CENTRAL TENDENCY (MEAN, MEDIAN, MODE)

MEASURE OF CENTRAL TENDENCY (MEAN, MEDIAN, MODE) See also Data Presentation CHANGE OF SUBJECT OF A FORMULA WORD PROBLEMS ALGEBRAIC PROCESSES APLLICATION OF BINARY NUMBERS

## Statistics | Data Presentation

Statistics | Data Presentation See also CHANGE OF SUBJECT OF A FORMULA WORD PROBLEMS ALGEBRAIC PROCESSES APLLICATION OF BINARY NUMBERS BINARY NUMBERS

## CHANGE OF SUBJECT OF A FORMULA

CHANGE OF SUBJECT OF A FORMULA See also WORD PROBLEMS ALGEBRAIC PROCESSES APLLICATION OF BINARY NUMBERS BINARY NUMBERS SIMPLE EQUATION AND VARIATION

## WORD PROBLEMS

WORD PROBLEMS See also ALGEBRAIC PROCESSES APLLICATION OF BINARY NUMBERS BINARY NUMBERS SIMPLE EQUATION AND VARIATION SQUARES OR POWERS OF NUMBERS

## ALGEBRAIC PROCESSES

ALGEBRAIC PROCESSES Objective:  Use letter to generalize statements Interpret mathematical symbols Solve simple and problems Generating statement The following symbols are generally used in mathematics “=” means is equal to” Example: 13 – 6 = 7 means thirteen minus six is equal to seven “>” means is greater than” Example: 18 > 10 means eighteen

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