Chapter 7: Basic Math Skills
Bar Graph
A drawing made up of a parallel bars whose lenghts correspond to what is being measured.
Survey
A gathering of a sample of data or opinions considered to be representative of a who
Line Graph
A line (or lines) that joins points representing changes in a quantity over a specific period of time.
Percentage
A number expressed in parts per 100.
Circle Graph
A pie-shaped figure that shows the relative sizes of the parts of a whole.
RPN
A reverse-entry method used in calculators, in which the operators follow the operands.
Mixed Fraction
A whole number and a fraction.
A= L×W
A: Area L: Lenght W: Width
Formula for the area of a rectangle is:
A= l×w
What are the rules for adding or subtracting decimal numbers and the rules when multiplying and dividing decimal numbers?
Adding and subtracting decimals is not too different from adding and subtracting any numbers. It is critical that you write your decimals so that the decimal points align, or you will find yourself adding tenths to ones or subtracting hundredths from tenths. As long as each of the numbers you are adding or subtracting has the same number of decimal places, the addition or subtraction is fairly easy. When you multiply decimals, do not align the decimal points. Simply line up the numbers along the right hand side of the problem. Then multiply just as you would if the numbers were all whole numbers and add at the end. After that count how many decimal places the two factors have (start at the far right of each number) and then give the answer that total number of decimal places. To divide decimals, always use long division. If the divisor has a decimal, you will need to move the decimal point in the divisor and the dividend by the number of decimal places in the divisor so that the divisor becomes a whole number. You may need to add zeros as placeholders in the dividend. Then place a decimal point for the quotient directly above the final decimal point in the dividend and be careful to line up all the digits in the correct place values as you divide.
Decimal Number
Another way to write a fraction or mixed number whose denominator is a power of 10.
Calculating Surface
Business skill that retailers use to figure out the floor space they need or how the space can be arranged.
What is the name of a business skill that is used to rearrange or fix space:
Calculating Surface
How can you share information about a changing market share to an audience that has difficulty that has difficulty with fractions, percentages, and decimals?
Creating graphs and charts would be a good way to explain what the fractions,percentages, and decimals. This would be a easier way to explain the cause.
When the denominator is part of a power of then it is called?
Decimal Number
Our number system are composed of ten numbers called what?
Digits
What is important for you to do when your answering questions with a calculator?
Estimate
To read a decimal number or write it in words, use the following example and steps:
Example: ( 15.0853) 1). Begin with the whole number to the left of the decimal point. ( Fifteen) 2). Read or write and for the decimal point. 3). Read or write the number to the right of the decimal point as a whole number. ( Eighty-three). 4). Use the name of the decimal place of the final digit ( Thousands). Result: Fifteen and eighty-three thousandths.
When adding and subtracting decimals numbers, What's the first & second step?
First, list the numbers vertically. Second, add or subtract as you would with whole numbers. (*May have to write zeros to fill empty columns.)
Group of symbols that seeks to make a profit from its operations.
Formula
What is used to describe a whole?
Fraction
Why is it important to estimate your answer when using a calculator?
It is important to estimate your answers when your using a calculator. You may make errors when entering numbers or operations. It is a good idea a estimate of the answer in mind.
Why is it important to know how to use algebraic operations by hand when calculators are available?
It's important to know how to use algebraic operations by hand when calculatiors are available because its a good way to build up your skill by developing number sense and fast skill. Also it helps you when you get to the course of doing computer sheets and so on.
Estimate
Judge tentatively or judge to be probable.
When the numerator is greater than the denominator, the fraction has to be converted to what?
Mixed Fraction
Fraction
Numbers used to describe or compare parts of a whole.
Names of the top and bottom of a fraction?
Numerator & Denominator
What method is used for calculators?
RPN
When converting any fraction into a decimal what do you do?
Simply, divide the numerator by the denominator.
When mutilplying with amounts of money, as when figuring tax amounts, discounts, and so on what should you round to?
The Nearest Tenth, Hundredth etc..
Denominator
The bottom part of a fraction, which represents how many parts in a whole.
Why is it important for you to know how to write decimals amd fractions and understand the relationship between the two?
The relationship between decimals and fractions is important for writing checks. After writing the amount as a decimal, you must write again. More than likely it will be in words for dollars and a fraction for the cents.
Digits
The ten basic symbols in our numbering system: 0,1,2,3,4,5,6,7,8, and 9. Each number is a representation of a larger number.
Numerator
The top number of a fraction, which represents the number of parts being considered.
How are the uses of different types of graphs connected to different measures of central tendency?
These charts and graphs presents data in a way that is easier to understand than series of numbers.
When would you use fractions to present information? When would you use decimals for the same purpose?
Use the fraction to present information only or when it has a numbet used to describe or compare parts of a whole. Use decimal when only the digits are on the righf of the fraction of a whole number when provided.
Pie Chart
a chart that shows the relationship of a part to a whole.
What should you do when writing a fraction or a mixed number as a percentage? How would you do so?
1). Convert the fraction to decimal form Do this by dividing the numerator by the denominator. If there is a whole number, add it to the converted fraction. Then multiply by 100. (*Calculator would be best to use)
Five steps to solving percentage problems:
1). Estimate the answer. 2). Translate the problem into a math statement. 3). Do the calculations 4). If necessary, round money amounts to the nearcest cent 5). Check you answer
What is the two-step process to multiply decimal numbers?
1). Mutiply the two numbers as if they were whole numbers. Ignore the decimal points for now. 2). Add the number of decimal places in the numbers being multiped. Start from the right and count thw same number being multiplied. Start from the right and count the same number of decimal places in the products and insert the decimal point.
Five Steps when you read whole numbers or writing in words are:
1). Separate the number into groups of three digits: units, thousands, and millions. Very large numbers may include groups of digits for billions, trillions, and even higher groups. 2). Separate the groups with commas. 3). When writing the names of whole numbers, never use the word AND.! 4). Use hyphens in numbers less than 100 that are written as two words. 5). When a three digits group is made up of only zeros, do not write the name of the group.
How to divide decimal numbers?
1). Set up the division problem as you would with whole numbers. 2). Shift the decimal point in the divisor so that the divisor becomes a whole number. The divisor is the number you are divided by. Then shift the decimal point in the dividend the same number to be divided. Write zeros in the dividend, if necessary, in order to place the decimal point. 3). Place a decimal point in the answer space directly above its new postion in the dividend. Then divide as with whole numbers. ( *May need to write extra zeros after the decimal point in order to complete the division).
Writing a whole number or a decimal number as a percentage mutiply by:
100
When using a 10-key keypad, what the three keys?
4, 5, and 6