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Measuring and constructing segments of a specified length. Teaching Objectives The lesson is designed to develop several key competencies:

Teaching students to analyze, compare, and generalize mathematical concepts.

Encouraging pair work and mutual assistance among students. Measuring and constructing segments of a specified length

Mastering addition and subtraction within the studied range using decimal composition.

For lesson 52 of the 1st-grade mathematics curriculum under the , the core focus is on the theme "Adding and Subtracting Numbers" . This lesson typically aims to refine mental calculation skills within 10 and 20 based on the decimal composition of numbers. Key Content of the Presentation Mastering addition and subtraction within the studied range

Exploring properties of subtraction, such as the impossibility of subtracting a larger number from a smaller one at this stage, and subtracting zero.

Comparing and classifying numerical expressions and solving text-based problems involving addition and subtraction. Key Content of the Presentation Exploring properties of

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