Find the Missing Partner to Ten
Draw two rows of five boxes and fill the stated number.
About 12 minutes, plus any extended practice
Open lesson 1Find Partners and Missing Parts
Find complements to ten and several decompositions of a small whole.
Before you begin
- Count to ten; join and remove small drawn groups.
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 More Than One Split of a Whole
Draw the whole, divide it into the stated first part and the remaining part, and count both.
About 12 minutes, plus any extended practice
Open lesson 2Find a Hidden Part of Five
Make a drawing of the whole before covering any marks.
About 12 minutes, plus any extended practice
Open lesson 3Check Whether Two Sides Name the Same Amount
Draw each sum as two small parts and count its total.
About 12 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: K.OA.A.3 — Find complements to ten and several decompositions of a small whole.
- Common Core State Standards, mathematics: K.OA.A.4 — Find complements to ten and several decompositions of a small whole.
- Common Core State Standards, mathematics: K.OA.A.5 — Find complements to ten and several decompositions of a small whole.
These references informed the topic selection. They do not certify complete standards alignment.