Describe the result of adding a large positive number and a smaller negative number.
A smaller positive number; subtract the smaller from the larger.
How do you convert a fraction into a decimal?
Divide numerator by denominator.
What is the key step that must be performed in order to add or subtract unlike fractions?
Find the least common denominator.
How do you divide one fraction by another?
Invert the divisor and multiply.
How can you convert a decimal into a percent?
Multiply by 100 (move decimal two places right) and add %.
How do you convert a fraction into a percent?
Convert to decimal, move decimal two places right, add %.
How do you change a decimal into the nearest equivalent fraction?
Multiply by desired denominator for numerator.
What are two different ways that a ratio may be expressed?
As a fraction or with a colon.
What is a proportion?
Equality of two ratios.
What is meant by the root of a number?
Equal numbers that multiply to produce the number.
How do you find the square of a number? Give an example.
Multiply number by itself, 4x4=16
What is a common method of making computations involving very large or very small numbers more manageable?
Convert to scientific notation using powers of 10.
How is 100,000 expressed as a power of 10?
10⁵.
What formula is used to find the area of a rectangle and of a triangle?
Rectangle: A = L × W; Triangle: A = B x H 1/2
Define Pi (π).
Ratio of circumference to diameter (≈ 3.1416).
Describe a trapezoid.
Four-sided figure with two parallel sides.
What is the formula for computing the area of a circle?
A = πr².
What is meant by a negative number?
A number less than zero.
What steps are used to add signed numbers?
Add positives, add negatives, subtract smaller from larger; answer is sign of larger.
What steps are used to subtract signed numbers?
Change sign of subtrahend and add; apply sign rules.
What steps are used to multiply signed numbers?
Multiply values; like signs positive, unlike negative.
What steps are used to divide signed numbers?
Divide values; like signs positive, unlike negative.
