Subtraction within 1,000 using an Open Number Line

This lesson teaches subtraction within 1,000 using an open number line. It covers breaking numbers into place values, the relationship between addition and subtraction, and visualizing subtraction with open number lines. The lesson also explores alternative subtraction methods and introduces the hopping up method to find differences.

What is the process of finding the difference between two numbers called?

Describe the relationship between addition and subtraction as mentioned in the lesson.

How can you solve for an unknown part in a subtraction problem using addition?

How can you visualize subtraction using an open number line?

Explain how to break down the number 346 into hundreds, tens, and ones for subtraction.

What is the result of subtracting 872 from 346?

What steps would you take to solve 926 minus 671 using hops?