Temperature
Track a temperature rising from 45°F to 62°F.
Algebra Readiness · Unit 1 · AR-U1-WS7
Whole-Number Number Lines
A number line puts numbers in order and shows the distance between them. Use it to see addition as movement right and subtraction as movement left.
27+1037+643
Why should I care?
Number Lines Track Change
They help us see where we start, how far something changes, and where it ends.
Hotel Floors
Move from the lobby to a higher floor.
Field Position
Follow yards gained or lost.
Distance
Compare locations along a route.
Build it correctly
Anatomy of a Number Line
Numbers increase from left to right. Tick marks must be equally spaced, and each space must represent the same amount.
051015202530
Starting value The first labeled numberInterval Each space is worth 5Direction Values become greater to the right
Five clear steps
Create Your Own Number Line
Choose the starting and ending numbers.
Decide what each equal space represents.
Draw equally spaced tick marks.
Label the values in order.
Add arrows to show the line continues.
Guided interactive practice
Build Your Own Number Line
Decide the range and scale. More than one number line may be correct.
Design a number line to solve7 + 5 = ?
Small spaces show every counting step.Thick marks are the numbers you label.
Move right
Addition on a Number Line
Start at the first number. Break the amount being added into helpful jumps.
27 + 16
273743
+10+6
Step 1: Start at 27.
Step 2: Jump +10 to 37.
Step 3: Jump +6 to 43.
Move left
Subtraction on a Number Line
Start at the first number. Move left because the value is becoming smaller.
54 − 18
364454
-10-8
Step 1: Start at 54.
Step 2: Jump −10 to 44.
Step 3: Jump −8 to 36.
Interactive practice
Plan Your Jumps
Start at 27. Add 16. Choose efficient jumps and land on the answer.
0102030405060708090100
▼27
Your jumps: Choose a jump below.
Real-life game · Level 1
Elevator Number-Line Challenge
Choose a building. Each one has 10 different elevator trips, so you can switch buildings for more practice.
Real-life practice
Temperature Change Lab
100°80°60°40°20°0°
48°F
Morning commute
It starts at 48°F. The temperature rises 12°.
Adjust the thermometer to show the new temperature.
Preview of a later lesson
What Happens Below Zero?
Temperatures below 0°F, underground hotel floors, and places below sea level need numbers less than zero. These are called negative integers. We will study them fully later in Unit 1.
🌡️Below 0°🅿️Underground floors🌊Below sea level
Printable practice · AR-U1-WS7
Whole-Number Number Lines Worksheet
Questions 1–10 provide the core, chunked assignment. Questions 11–16 extend the thinking with errors, real situations, drawing, and explanation.