Lesson objective: Compare decimals with different numbers of digits by using understanding of place value and number lines.

This lesson helps to build procedural skill with decimal comparison. Number lines are used here because they provide students with a visual as to how specific numbers are related. This work develops students' understanding that decimals with different numbers of digits can be compared.

Students engage in Mathematical Practice 7 (Look for and make use of structure) as they use number lines and understanding of place value to compare decimals with different numbers of digits to the right of the decimal point.

**Key vocabulary:**

- compare
- decimal
- equal to
- equivalent
- greater than
- less than
- number line
- place value
- tenths
- hundredths
- thousandths

**Special materials needed:**

- scratch paper and number lines, as needed