Chapter 1 - Mathematics - Oral Questions

Question 1

Describe the result of adding a large positive number and a smaller negative number

Answer 1

result is smaller positive number, same as ignoring the signs and subtracting smaller number

Question 2

How do you convert a fraction into a decimal?

Answer 2

Divide the top number by bottom number

Question 3

What is the key step in order to add or subtract unlike fractions

Answer 3

finding the lowest common denominator

Question 4

How do you divide one fraction by another

Answer 4

Invert divisor (flip over the second fraction) and multiply both numerators and denominators (top and bottom numbers)

Question 5

How can you convert a decimal into a percent

Answer 5

Multiply decimal by 100 and add % sign, or

move decimal TWO places to the RIGHT and add %

Question 6

How do you convert a fraction to a percent

Answer 6

Convert to decimal, move decimal two places to the right, add %

Question 7

How do you change a decimal to nearest equivalent fraction

Answer 7

Multiply decimal by desired denominator, result becomes numerator of fraction (try to get closest to whole number)

Question 8

Two different ways a ratio can be expressed?

Answer 8

1- as a fraction
2- placing a colon between the numbers (5:54)
3- using the word “to” between the numbers

Question 9

What is a proportion?

Answer 9

a statement of equality (=) between two or more ratios:

1/2 = 4/8,

45/90 = x/100

Question 10

What is meant by the root of a number?

Answer 10

A root is two or more equal smaller numbers that when multiplied equal the specified number:

the second (square) root of 9 is 3,

the fifth root of 32 is 2

Question 11

How do you find the square of a number? Give an example.

Answer 11

multiply the number times itself-

4 X 4=16,

10 X 10= 100

Question 12

What is a common method of making computations involving very large or very small numbers more manageable?

Answer 12

Convert the numbers into scientific notation by using powers of 10.

7,234,000 = 7.234 X 10⁶

Question 13

How is 100,000 expressed as a power of 10?

Answer 13

10 to the fifth

10⁵

Question 14

what formula is used to find the area of a rectangle and of a triangle?

Answer 14

Rectangle Area = Length x Width

A = L x W

**Triangle **Area = 1/2 x Base x Height

A = .5 x B x H

Question 15

Define Pi

Answer 15

A constant that expresses the relationship between circumference and diameter of a circle, approximately 3.14159 (number of times the diameter goes into the circumference)

Question 16

Describe a trapezoid

Answer 16

A trapezoid is a closed, four-sided figure having two parallel sides and two sides that are not parallel.

Question 17

What is the formula for the area of a circle?

Answer 17

A = Pi x r²