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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 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 numerator by the 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 do you convert a decimal into percentage? |
Multiply the decimal by 100 and add the percent sign. Or 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 into 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 the two different ways that a ratio may be expressed? |
As a fraction or by placing a colon between the two numbers or by using the word to between the two numbers |
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What is 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. |
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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? |
10^5 (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= L x W. For a triangle, A = ½(B x H) |
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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. |
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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? |
Area = pi times R squared. |
