1 Math

Question 1

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

Answer 1

Smaller positive number.

Question 2

2. How do you convert a fraction into a decimal?

Answer 2

Divide numerator by denominator.

Question 3

3. What is the key step that must be performed in order to add or subtract unlike fractions?

Answer 3

Find the least common denominator.

Question 4

4. How do you divide one fraction by another?

Answer 4

You invert the divisor and multiply the numerators together and the denominators together.

Question 5

5. How can you convert a decimal into a percent?

Answer 5

1. Multiply the decimal by 100 and add percent sign.
2. Move decimal 2 places to the right and add percent sign.

Question 6

6. How do you convert a fraction into a percent?

Answer 6

Convert it to a decimal, move the decimal 2 places to the right, add percent sign.

Question 7

7. How do you change a decimal into the nearest equivalent fraction?

Answer 7

Multiply decimal by desired denominator. The result becomes the numerator in the fraction.

Question 8

8. What are 2 different ways that a ratio may be expressed?

Answer 8

1. As a fraction.
2. By placing a colon between 2 numbers.
3. By using the word to between the 2 numbers.

Question 9

9. What is a proportion?

Answer 9

A statement of equality between 2 or more ratios.

Question 10

10. What is meant by the root of a number?

Answer 10

A root is 2 or more equal smaller numbers that, when multiplied together, equal the specified number.

Question 11

11. How do you find the square of a number?

Answer 11

Multiply the number by itself.

Question 12

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 power of 10.

Question 13

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

Answer 13

10 ^ 5th power.

Question 14

14. What formula is used to find the area of a rectangle and of a triangle?

Answer 14

Rectangle: A=L×W
Triangle: A=1/2(B×H)

Question 15

15. Define Pi.

Answer 15

Pi is a constant that expresses the relationship between the circumstances of a circle and its diameter and is approx equal to 3.14.

Question 16

16. Describe a trapezoid.

Answer 16

A closed 4 sided figure having 2 parallel sides and 2 sides that aren’t parallel.

Question 17

17. What is the formula for computing the area of a circle?

Answer 17

A=pie×R^2