Flashcards in General Chapter 01 Deck (17)

Loading flashcards...

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