Goals & Standards - Strategies to Add and Subtract within 20

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Strategies to add and subtract within 20 - Grade 1

Mathematical Goals

This toolkit will address adding and subtracting using within 20 (0-20). This lesson will help you assess how well students understand the concepts of (1.OA.C.6):

Add and subtract within 20
Demonstrate fluency for addition and subtraction within 10
Use strategies such as counting on, making ten, decomposing a number leading to a ten, using the relationship between addition and subtraction, and creating equivalent but easier or known sums
Using models or drawings to represent problem-solving addition and subtraction word problems

Meets either Colorado academic standards or mathematical practice standards

Colorado Academic Standards

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Meets either Colorado academic standards or mathematical practice standards

Mathematical Practice Standards

Math practice standards are thinking strategies for developing skills and habits in math learning. They focus on concepts to cultivate proficiency and prepare students for real-world applications. “These practices rest on important ‘processes and proficiencies’ with longstanding importance in mathematics education.” The Math Practices describe ways in which students ought to engage with the content as they grow in their mathematical expertise.

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This lesson relates to the following Standards for Mathematical Practice (MP)