WEIGHT
The units used for measuring weight are kilogram (kg) and gram (g). 1000 gram = 1kg 1000kg = 1 ton EXAMPLE1 Change to kilogram 2000g to kilogram 1000g… Read More »WEIGHT
Mathematics (Primary Classes)
VOLUME OF CYLINDER
Volume of cylinder = πr2h = π x r x r x h EXAMPLE Find the volume of a cylinder of radius 3 ½ cm and height 12cm Solution… Read More »VOLUME OF CYLINDER
AREA OF RIGHT ANGLED TRIANGLE
A right-angled triangle has 3 – sides Example 1 Calculate the area of a triangle of height 12cm and base 13cm Solution Area of triangle = ½ x base x… Read More »AREA OF RIGHT ANGLED TRIANGLE
PROFIT AND LOSS PERCENT
Profit or loss percent is expressed as a percentage of the cost price EXAMPLE 1 An article bought for $3,000 was sold for $3,300. Find the profit percent Solution Cost… Read More »PROFIT AND LOSS PERCENT
SIMPLE INTERREST
Meaning of interest: interest means the extra money that you [ay back when ypu borrow money that you receive when you invest money. EXAMPLE 1 find the simple interest on… Read More »SIMPLE INTERREST
MONEY: PROFIT AND LOSS
MEANING OF PROFIT When the selling price of an article is higher or greater than the cost price, we have a profit or gain. Profit = selling price – cost… Read More »MONEY: PROFIT AND LOSS
SIMPLE PROBLEMS ON PERCENTAGES
Percentages are fractions with 100 as denominator EXAMPLE 1 Change the following fractions to percentages 2/5 = 2/5 of 100 = 2/5 × 100 = 200 = 40% 5 EXAMPLE… Read More »SIMPLE PROBLEMS ON PERCENTAGES
RATIO AND PERCENTAGE
Meaning of Ratio The relation between two quantities (both of the same units) obtained by dividing one quantity with another is called ratio. Ratio can be denoted by using the… Read More »RATIO AND PERCENTAGE
PROFIT AND LOSS
Example 1 A man bought a leather bag for N350.00 and sold it for N360.00 will he have more money or less money with him? Solution Selling price = N460.oo… Read More »PROFIT AND LOSS
PROBLEM ON MULTIPLICATION OF MONEY
EXAMPLE Find the cost of 3 books at N91.55 each. Solution N91. 55 × 3 N274.65 EXERCISE 52 x 4 75 x 6 75 x 6 91 x 8… Read More »PROBLEM ON MULTIPLICATION OF MONEY
Money
Addition of Money Example: find the sum of N4.36, N3.79 and N4.82 N K 4 36 + 3. 7 9 + 4. 8 2 12. 9 7 EXERCISES… Read More »Money
ESTIMATION
Rounding off decimals to the nearest whole number Rules for rounding off decimals to the nearest whole number When the rounding off decimals to the nearest whole number, look at… Read More »ESTIMATION
HIGHEST COMMON FACTOR (HCF)
The product of 2 and 3 is; 2 x 3 = 6 2 and 3 are factors of 6 The factors of a number are numbers that divide the number… Read More »HIGHEST COMMON FACTOR (HCF)
LEAST COMMON MULTIPLES (LCM)
Example 1: Find the least common multiples of 2 and 3 The multiples of 2 are: 2, 4, 6, 8, 10, 12, 14, 16, 18, 20, 22, and 24 The… Read More »LEAST COMMON MULTIPLES (LCM)
SQUARES AND SQUARE ROOTS OF NUMBERS
SQUARES AND SQUARE ROOTS OF NUMBERS (1- digit and 2 – digit numbers) Example: 1: find 22 = 4 2 =( 2 x 2) + ( 4 x 4)… Read More »SQUARES AND SQUARE ROOTS OF NUMBERS
MULTIPLICATION OF NUMBERS
MULTIPLICATION OF NUMBERS BY 2-DIGIT NUMBERS Example 1 multiply 25 by 12 Method 1: column form method 2: Expanded form 2 5 25 x 12 = 25 x (10… Read More »MULTIPLICATION OF NUMBERS