CKMath Unit 5: Composing and Decomposing Numbers to 10
Focus:
In this unit, students explore different ways to compose and decompose numbers within 10 and to represent the compositions and decompositions. Special attention is given to composing and decomposing 10, as it is the basis of place value in our number system. To support their reasoning, students use their fingers and a 10-frame—created by putting together two 5-frames. They use these tools to think about pairs of numbers that make 10. The work here prepares students to make sense of teen numbers in the next unit and lays the groundwork for students to develop fluency with addition and subtraction facts within 10 in grade 1.
Number of Lessons: 13 and 2 optional
Instruction Time:
Approximately 60 minutes
(Please note that each lesson is designed for one instructional block, and may be divided into shorter or longer segments based on teacher pacing and student needs.)
Additional Search Terms:
equation • representation • quantities • solutions
