JSS 1 Mathematics (1st, 2nd & 3rd Term)

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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). […]

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INDICES

INDICES See also STANDARD FORM AND APPROXIMATION MODULAR ARITHMETIC RULES OF BASE NUMBER NUMBER BASES BASIC OPERATIONS OF INTEGER

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Geometry – Plane Shapes

Plane shapes are two-dimensional shapes bounded by lines known as sides. Any shape drawn on a plane is called a two-dimensional shape (or 2-D shapes for short). When we say a figure is two- dimensional, we mean it can be measured along x and y axes i.e. it has length and width or breadth.  

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SIMPLE EQUATIONS

SIMPLE EQUATIONS An algebraic equation is two algebraic expressions separated by an equal sign. The left hand side is equal to the right hand side (LHS = RHS) e.g     7 + 3 = 10,  20 -6 = 14,  4 x 5 = 20, 35/7 = 5 Translation of algebraic equations into words: Any letter of

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SIMPLE ALGEBRAIC EQUATION

SOLUTION OF PROBLEMS ON SIMPLE ALGEBRAIC EQUATION Solving equation by balance method Equation with bracket Equation with fraction. Solving Equation by Balance Method To solve an equation means to find the values of the unknown in the equation that makes it true.   For example: 2x – 9 = 15. 2x – 9 is on

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ALGEBRAIC EXPRESSION

ALGEBRAIC EXPRESSION Definition with examples Expansion of algebraic expression Factorization of simple algebraic expressions   Definition with examples   In algebra, letters stand for numbers. The numbers can be whole or fractional, positive or negative. Example Simplify the following -5 x 2y -3a x -6b -14a/7 -1/3 of 36×2   Solution 1)    -5 x 2y =

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DIRECTED NUMBERS

ADDITION AND SUBTRACTION OF DIRECTED NUMBERS Directed numbers are the positive and negative numbers in any given number line e.g   -4         -3         -2         -1         0          1          2          3           4 The (+) and (-) signs show the direction from the origin (o). To add a positive number move to the

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SIMPLE INTEREST

Interest is the money paid for saving a particular amount of money. Simple interest can be calculated using the formula Simple interest I = PRT/100   Where P= principal, R=rate & T= time Also total amount =principal +interest   Example 1 Find the simple interest on N60, 000 for 5 years at 9% per annum

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WHOLE NUMBERS AND DECIMAL NUMBERS

Difference between Whole Numbers and Decimal Numbers Whole number is a number without fraction. For example 1, 2, 3, 41000, 38888 are examples of whole numbers.71/2 is not a whole number. A decimal number is a fractional number less than 1. It is smaller to a whole number. Examples – 0.1,0.01,0.001etc   Whole Numbers in

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BASIC OPERATION OF INTEGERS

Definition of Integer An integer is any positive or negative whole number   Example: Simplify the following (+8) + (+3)      (ii) (+9) –  (+4) Solution (+8) + (+3) = +11                   (ii) (+9) – (+4) = 9-4 = +5 or 5   Evaluation Simplify the following (+12) –(+7)                (ii) 7-(-3)-(-2)   Indices The plural of index

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