standard_description: Understand that the three digits of a three-digit number represent amounts of hundreds, tens, and ones; e.g., 706 equals 7 hundreds, 0 tens, and 6 ones. Understand the following as special cases:
- 100 can be thought of as a bundle of ten tens — called a “hundred.”
- The numbers 100, 200, 300, 400, 500, 600, 700, 800, 900 refer to one, two, three, four, five, six, seven, eight, or nine hundreds (and 0 tens and 0 ones).
problem_activity: Narrative
The purpose of this activity is for students to have another chance to practice skip-counting by 2, 5, and 10 and addition and subtraction within 1,000.
Required Materials
Materials to Gather
Materials from previous centers
Required Preparation
Gather materials from:
Write Numbers, Stage 4
Target Numbers, Stages 6 and 7
Five in a Row, Stages 7 and 8
How Close, Stage 4
Launch
“Now you will choose from centers we have already learned.”
Display the center choices in the student book.
“Think about what you would like to do first.”
30 seconds: quiet think time
Activity
Invite students to work at the center of their choice.
15
–
20 minutes: center work time
“Choose what you would like to do next.”
15
–
20 minutes: center work time
If time allows, have students choose a third center to work on.
Student Facing
Choose a center.
Write Numbers
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Target Numbers
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Five in a Row
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How Close
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Activity Synthesis
Invite 2-3 students to share their favorite method for adding and subtracting within 1,000.


aligns: no