Math3-5
Three-Digit Place Value Mastery for Grade 3
By Rece O.
An advanced online task for 3rd graders that builds three-digit place value understanding, including non-standard groupings like 12 tens and base-10 block models. It pairs a worked example with challenge problems that push students to reason flexibly about hundreds, tens, and ones.
Customize for your classroom
Teacher Guide & Tips
- Use this as an extension or enrichment block after students have a basic grasp of place value, roughly 30 to 45 minutes, either independently online or in small groups.
- Discussion question: Why does 12 tens equal 1 hundred and 2 tens, and how can base-10 blocks show that regrouping?
- Scaffold for struggling readers: Have students build the number with physical base-10 blocks first, then match each step of the worked example to what they built.
- Extension for advanced students: Ask them to create their own non-standard grouping problem, such as 2 hundreds, 15 tens, and 3 ones, and explain how to solve it.
- Estimated time: Plan about 35 minutes for the review, the worked example, and the challenge problems.
Math3-5
Three-Digit Place Value Mastery for Grade 3
By Rece O.
An advanced online task for 3rd graders that builds three-digit place value understanding, including non-standard groupings like 12 tens and base-10 block models. It pairs a worked example with challenge problems that push students to reason flexibly about hundreds, tens, and ones.
Customize for your classroom
Teacher Guide & Tips
- Use this as an extension or enrichment block after students have a basic grasp of place value, roughly 30 to 45 minutes, either independently online or in small groups.
- Discussion question: Why does 12 tens equal 1 hundred and 2 tens, and how can base-10 blocks show that regrouping?
- Scaffold for struggling readers: Have students build the number with physical base-10 blocks first, then match each step of the worked example to what they built.
- Extension for advanced students: Ask them to create their own non-standard grouping problem, such as 2 hundreds, 15 tens, and 3 ones, and explain how to solve it.
- Estimated time: Plan about 35 minutes for the review, the worked example, and the challenge problems.