Flashcards in General Chapter 01 Deck (17)
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0
Describe the result of adding a large positive number and a smaller negative number.
The result is a smaller positive number, and is the same as ignoring the signs and subtracting the smaller number from the larger.
2
How do you convert a fraction into a decimal?
Divide the top number (numerator) by the bottom number(denominator).
3
What is the key step that must be performed in order to add or subtract unlike fractions?
You must find the lowest (least) common denominator.
4
How do you divide one fraction by another?
You invert the divisor and multiply the numerators together and the denominators together.
5
How can you convert a decimal into a percent?
1) Multiply the decimal by 100 and add the percent sign. (2) Move the decimal point two places to the right and add the percent sign.
6
How do you convert a fraction into a percent?
Convert it to a decimal, move the decimal point two places to the right and add the percent sign.
7
How do you change a decimal into the nearest equivalent fraction?
Multiply the decimal by the desired denominator. The result becomes the numerator in the fraction.
8
What are two different ways that a ratio may be expressed?
(1) As a fraction. (2) By placing a colon (:) between the two numbers. (3) By using the word "to" between the two numbers.
9
What is a proportion?
A statement of equality between two or more ratios.
10
What is meant by the root of a number?
A root is two or more equal smaller numbers that, when multiplied together, equal the specified number.
11
How do you find the square of a number? Give an example.
Multiply the number by itself. Examples: 4 x 4 = 16, 7 x 7 = 49.
12
What is a common method of making computations involving very large or very small numbers manageable?
Convert the numbers into scientific notation by using powers of 10.
13
How is 100,000 expressed as a power of 10?
10^5 (10 to the 5th power).
14
What formula is used to find the area of a rectangle and of a triangle?
For a rectangle, A = L X W, For a triangle, A = 1/2(B X H).
15
Define Pi
Pi is a constant that expresses the relationship between the circumference of a circle and its diameter and is approximately equal to 3.1416.
16
Describe a trapezoid.
A trapezoid is a closed, four-sided figure having two parallel sides and two sides that are not parallel.
17
