Tag: Computation

Standard Form

Numbers written in the form; A x 10n Where, 1 ≤ A ≤ 10, are in Standard Form. When writing a number in standard form: Step 1:  Write the number in the form A. That is, turn the number into a number greater than or equal to 1, and/or less than or equal to 10. This…...

BODMAS

BODMAS BODMAS is the acronym for the order in which arithmetic operations are carried out. This acronym states that given a problem to solve, work out the: B – brackets, M – multiplication, D – division, A – addition and S – subtraction of quantities in that order. Note: Do multiplication and division, in the order…...

Whole Numbers

Whole Numbers This section illustrates how to compute the addition, subtraction, multiplication and division of whole numbers. Addition Add the numbers 584 and 646. Procedure: In addition, we add from right to left. So for the problem above, we start with the extreme right column. The numbers in that column are 6 and 4; when…...

Fractions

Fractions A fraction is a number written in the form , where 3 is called the numerator and 5 the denominator. There are two types of fractions, common and improper fractions. A common fraction is one whose numerator is less than the denominator; hence, all common fractions are less than 1.  An improper fraction is…...

Decimals

Decimals Decimals consist of a whole number and a decimal fraction. Decimal                                = Whole number              +             Decimal fraction 7.8                          = 7          +             0.8 Decimal fractions are numbers written after decimal points; example, .8 is a decimal fraction. The numbers after the decimal point are actually the numerators of a fraction, with the…...

Conversions between Rational Numbers

Conversions between Rational Numbers Fractions to Decimals Method 1 To convert a fraction to a decimal, divide the numerator by the denominator. Example Procedure: is similar to normal division except, since 8 goes into 4 zero times, a decimal point is placed after the zero and a zero added to 4 turning it into 40.…...

Significant Figures

Significant Figures To approximate a number to a given amount of significant figures, follow the instructions outlined in the example below. Example It should be noted that the first significant figure cannot be zero. Example     Read more →...

Decimal Places

Decimal Places To approximate a number to a given amount of decimal places follow the instructions outlined in the example below. Example   Read more →...

Percentage or Fraction of a Quantity

Percentage or Fraction of a Quantity To find the percentage of a quantity, express the percentage as a fraction (write the percentage given over 100) and multiply by the quantity. Example What is 40% of 500? To find the fraction of a given quantity, multiply the fraction by the quantity. Example   Read more →...

A Quantity as a Percentage or Fraction of Another

A Quantity as a Percentage or Fraction of Another To express a quantity as a percentage of another quantity, divide the first quantity by the second and multiply by 100. Example Express 80 as a percentage of 960. To express a quantity as a fraction of another, write the first quantity over the second and…...