Ones, Tens, and Hundreds

Explicit Instruction/Teacher modeling

• Write the following problems on the whiteboard: three hundreds, four tens, and five ones, one hundred, two tens, and one one, and six hundreds, eight tens, and seven ones.
• Ask your students to demonstrate what these numbers look like using blocks.
• Inform your students that these numbers can be written in numeric form.
• Use the example three hundred, four tens, and five ones.
• Make a chart on the whiteboard with a hundreds, tens, and ones column. Write 3, 4, and 5 under each column, respectively.
• Inform the students that the answer is 345.
• Ask two students to complete the other two problems on the whiteboard.

Guided Practice

• Give the students four problems, and allow them to work in groups to solve the problems. For example, two hundreds, one ten, and five ones, one hundred, three tens, and seven ones, three hundreds, two tens, and five ones, and one hundred, one ten, and zero ones.
• Ask your students to write the numeric form of each problem.
• Ask your students to then draw hundreds, tens, and ones blocks to represent each problem.
• Walk around the room, and provide correction where it is needed.

Independent working time

• Pass out the Ones, Tens, and Hundreds worksheet, and direct your students to complete it.
• Collect the assignment once it is completed.