Count Equal Rows
Use repeated addition to count objects arranged in equal rows.
Open lesson 1Equal Groups and Changing Totals
Use pairs and equal rows to organize counts and solve a two-step story.
Before you begin
- Add and subtract small whole numbers.
- Count drawings once and recognize rows that have equal numbers.
Choose by skill rather than age alone. Read with an adult when useful, revisit a lesson, or explore another grade.
Follow the lesson sequence
Make Pairs to Test Even or Odd
Decide whether all objects can be grouped into pairs.
Open lesson 2Split an Array Without Losing Dots
Find an array total by adding totals from two smaller arrays.
Open lesson 3Use Two Steps to Count What Is Left
Find an array total before subtracting objects that leave.
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.