Using an Open Number Line to Solve Addition Math Story Problems

This lesson teaches how to solve addition story problems using an open number line. It begins with a review of number lines and their units, followed by a step-by-step solution of 14 + 67. Common misunderstandings are addressed, and the problem is revisited to reinforce learning. A story problem about distance is solved using the same method, concluding with a summary of the lesson.

What is the first step when solving an addition problem using an open number line?

• Start with the smallest addend

• Choose the greatest addend to start with

• Add both numbers directly

• Draw a number line with unit marks

How does an open number line help in solving addition problems?

• It only works for subtraction

• It helps visualize the addition process linearly

• It allows for random jumps

• It requires exact unit marks

What is a common mistake when using an open number line?

• Counting backwards

• Using a closed number line

• Ignoring the size of the jumps

• Starting with the smaller number

In the story problem, how many yards did you and your friend walk in total?

• 83 yards

• 50 yards

• 70 yards

• 100 yards

What is the purpose of using an open number line in the story problem?

• To subtract the distances

• To visualize the total distance walked

• To find the shortest path

• To measure the time taken