Exchange Ten Tens for a Hundred
Group the supplied tens into sets of ten tens.
About 15 minutes, plus any extended practice
Open lesson 1Build and Read Numbers to One Thousand
Use hundreds, expanded form, comparisons, and skip-counting through 1000.
Before you begin
- Build two-digit numbers from tens and ones.
Choose by skill rather than age alone. Read with an adult when useful, revisit a lesson, or explore another grade.
Follow the lesson sequence
Read Hundreds, Tens, and Ones in Expanded Form
Multiply the hundreds digit by one hundred and the tens digit by ten.
About 15 minutes, plus any extended practice
Open lesson 2Compare Three-Digit Numbers from the Left
Align both numerals in a place-value chart.
About 15 minutes, plus any extended practice
Open lesson 3Continue a Skip-Count with Its Stated Step
Write the starting amount and the stated step size.
About 15 minutes, plus any extended practice
Open lesson 4Review and transfer
After the lessons, try 4 new review cases and a practical task. Each answer has an explanation and a link back to the related lesson.
Open the unit reviewGuest answers are temporary. Keep your own paper or document; this unit does not certify completion or record a school grade.
Topic references
- Common Core State Standards, mathematics: 2.NBT.A.1 — Use hundreds, expanded form, comparisons, and skip-counting through 1000.
- Common Core State Standards, mathematics: 2.NBT.A.2 — Use hundreds, expanded form, comparisons, and skip-counting through 1000.
- Common Core State Standards, mathematics: 2.NBT.A.3 — Use hundreds, expanded form, comparisons, and skip-counting through 1000.
- Common Core State Standards, mathematics: 2.NBT.A.4 — Use hundreds, expanded form, comparisons, and skip-counting through 1000.
These references informed the topic selection. They do not certify complete standards alignment.