Question 1

What is a number line?

Accepted Answer

A number line is a straight line where every number has exactly one position. Numbers increase from left to right. Zero is in the center, positive numbers are to the right, and negative numbers are to the left.

Question 2

What are integers?

Accepted Answer

Integers are whole numbers with no decimal part: …−3, −2, −1, 0, 1, 2, 3… They appear at the tick marks on a number line.

Question 3

Where do decimals live on a number line?

Accepted Answer

Decimals live between integers on the number line. For example, 3.5 is exactly halfway between 3 and 4, and −1.7 is between −2 and −1.

Question 4

What number is in the middle of the number line?

Accepted Answer

Zero (0) is in the exact middle of the number line. It is the reference point — neither positive nor negative.

A number is a position.

A number is a position.