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17 Cards in this Set
- Front
- Back
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Describe the result of adding a large positive number and a smaller negative 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. |
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How do you convert a fraction into a decimal ? |
Divide the top number (numerator) by the bottom number (denominator) |
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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 |
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How do you divide one fraction by another ? |
You invert the divisor and multiply the numerators together and the denominators together |
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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. |
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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. |
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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. |
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What are two different ways that 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 |
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What is a proportion ? |
A statement of equality between two or more ratios |
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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. |
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How do you find the square of a number ? |
Multiply the number by itself. Examples: 4x4=16, 7x7=49 |
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What is a common method of making computations involving very large or very small numbers more manageable ? |
Convert the numbers into scientific notation by using powers of 10. |
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How is 100,000 expressed as a power of 10 ? |
10 to the 5th power. |
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What formula is used to find the area of a rectangle and of a triangle ? |
For a rectangle, A=LxW, for a triangle, A=1/2(BxH). |
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Define Pi ? |
Pi is the ratio of the circumference to the diameter of any circle. |
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Describe a trapezoid ? |
A trapezoid is a closed, four-sided figure having two parallel sides and two sides that are not parallel. |
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What is the formula for computing the area of a circle ? |
A= π r^2 |
