Day 65 Numeracy (Integers and the Real Number Line)

Integers and the Real Number Line

The instructor will put a copy of the real number line on the whiteboard.

The instructor will then inform the class that the real number line continues from zero to the left in the negative direction (getting smaller), and zero to the right in the positive direction (getting larger).

Integers

The integersare natural numbers including 0 (0, 1, 2, 3 ...) and their negatives (0,-1, −2, −3, ...).
They are numbers that can be written without a fractional or decimal component, and fall within the set {... −2, −1, 0, 1, 2, ...}.
For example, 65, 7, and −756 are integers; 1.6 and 1½ are not integers. In other terms, integers are the numbers one can count with items such as apples or fingers, and their negatives, as well as 0.
Any number, positive or negative, has an opposite number the same distance from zero on the number line. The opposite of 5 is -5, and the oppositte of -2 is 2.

Students will use this information to complete the questions from page 67 of Mathematics Concepts: Student Workbook.