Subtracting Using a Number Line

This video tutorial teaches how to subtract using a number line. It begins with an introduction to the concept and explains the decomposition of numbers for easier subtraction. The tutorial covers the flexibility of number lines in terms of range and counting methods. Two practical examples are provided: one involving balloons and another with honey jars, demonstrating subtraction by moving left on the number line. The lesson concludes by reinforcing the learned concepts.

What does it mean to decompose a number, and can you provide an example?

Explain how a number line can represent different ranges of numbers.

How can you count on a number line besides counting by ones?

Describe the process of subtracting 20 from 38 using a number line.

What steps would you take to find the difference between 56 and 32 using a number line?