Let’s start by adding 65 + 6 on an open number line. Which number is the larger addend? Draw a dot on the number line and write the larger addend under it.
Hands-On
Add and subtract using an open number line.
Goal:
Goal:
Practice!
Goal: Can you add and subtract on an open number line?
Are you ready to add and subtract on an open number line? Let’s try together! You will need these number lines and a pencil.
Which number is the smaller addend? Draw that number of jumps to the right.
Now let’s label the jumps! Write +1 above each jump.
Write numbers under the number line to show where each jump lands.
The sum is the number that the last jump lands on. Write it on the blank in the addition sentence.
Great job! Let’s try subtracting now. Which number is the whole in 82 - 4? Draw a dot on the number line and write the whole under it.
Which number is the part? Draw that number of jumps to the left.
Now let’s label the jumps! Write -1 above each jump.
Write numbers under the number line to show where each jump lands.
The difference is the number that the last jump lands on. Write it on the blank in the subtraction sentence.
Mismatch Game
Which number line helps you add 67 + 5?
The correct number line adds 67 and 5 jumps to the right.
That is right! This number line adds 67 and 5 because it jumps to the right.
You got # out of # correct.
Click the
Retry button for another attempt.
You got a perfect score. Great job!
You can keep working with open number lines by clicking on the button below.
Number Lines