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Flashcards in General Chapter 01 Deck (17):
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

What is the formula for computing the area of a circle?

A = Pi r^2