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GENERAL
J MATHEMATICS
| Question | Answer |
|---|---|
| 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. |
| How do you convert a fraction into a decimal? | Divide the top number (numerator) by the bottom number (denominator). |
| What is the key step that must one performed in order to add or subtract unlike fractions? | You must find the lowest (least) common denominator. |
| How do you divide one fraction by another? | You invert the divisor and multiply the numerators together and the denominators together. |
| 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. |
| 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. |
| 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 |
| 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. |
| What is a proportion? | A statement of equality between two or more ratios. |
| 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 |
| 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. |
| 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. |
| How is 100,000 expressed as a power of 10? | 105 (10 to the 5th power) |
| 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). |
| 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. |
| .Describe a trapezoid. | A trapezoid is a closed, four-sided figure having two parallel sides and two sides that are not parallel. |
| What is the formula for computing the area of a circle? | A =Ilr2 |
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S_A_J
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