A whole number is represented by a point on a number line, with 0 as the starting reference and equal intervals representing equal increments in value. Learners interpret labeled and unlabeled scales, locate numbers through 1,000 by counting in ones, tens, or hundreds, and use positions to compare and order numbers; spacing reflects differences in value, not merely the visual length of labels. This understanding does not extend to negative numbers, fractions, decimals, or unrestricted larger-number scales.
A number line shows numbers in order from left to right. Start at . Equal spaces mean equal changes in value.
To locate a number:
Example: What number does point show?
The number line goes from to and is divided into equal intervals:
0 | | | P | | | | | 100
Step 1: Find the value of each interval.
There are equal intervals from to :
So, each step is .
Step 2: Count from to point :
Point is at .
Click a topic below to practice the foundational skills you'll need, learn the steps, or master this skill
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