1.3 Exploring real numbers

Question 1

Natural numbers

Answer 1

1,2,3

Question 2

Whole numbers

Answer 2

0,1,2,3

Question 3

Integers

Answer 3

-2,-1,0,1,2

Question 4

rational number

Answer 4

any number that you can write in the form a/b, where a and b are integers b = 0

Question 5

irrational number

Answer 5

cannot be expressed in the form a/b, where a and b are integers

Question 6

real number

Answer 6

rational and irrational numbers together

Question 7

counterexample

Answer 7

any example that proves a statement is false

Question 8

inequality

Answer 8

a mathematical sentence that compares the value of two expressions using an inequality symbol, such as <,>

Question 9

opposites

Answer 9

two numbers that are the same distance from zero on a number line but lie in opposite directions

Question 10

absolute value

Answer 10

a numbers distance from 0 on a number line, both -3 and 3 are 3 units from 0.