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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
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SMALLER POSITIVE NUMBER. it 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.
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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?
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find the LCD (least common denominator)
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How do you divide one fraction by another
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Invert the devisor and then multiply numerators and then multiply denominators together.
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How can you convert a decimal into a percent?
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multiply the decimal by 100 and add the percent sign.
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How do you convert a fraction into a precent?
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divide the numerator by the denominator and then multiply by 100 and add the percent sign.
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How do you change a decimal into the nearest equivalent fraction?
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multiply by the desired denominator & the result will become the numerator.
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What are two different ways that a ratio may be expressed?
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As a fraction or by placing a colon : inbetween the 2 numbers.
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What is a proportion?
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a statement of equality between 2 or more ratios
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What is meant by the root of a number?
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2 or more equal smaller numbers that when multiplied equal the specified number
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How do you find the square of a number? give an example
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Multiply the number by itself.
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?
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convert the numbers into scientific notation using powers of 10.
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How is 100,000 expressed as a power of 10?
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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?
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rectangle- AREA= L x W
triangle- 1/2 (B x H) |
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Define Pi
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Pi is a constant that expresses the relationship between the circumference of a circle and it diameter and is approx. equal to 3.1416
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Describe a Trapezoid.
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A trapezoid is closed, 4 sided figure having 2 parallel sides and 2 non-parallel sides.
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What is the formula for computing the area of a circle?
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Area= πr²
pi*r² |
