How do we use mental strategies for addition and subtraction within 20 in our daily lives?
Adaptive Perseverance: Overcoming challenges in learning and applying new mental strategies for math.
Learner’s Mindset: Developing a positive attitude towards math and confidence in using mental math.
Critical Thinking: Analyzing and choosing the most effective mental strategy for different types of problems.
Communication: Explaining and discussing mental math strategies with peers.
Responsibility: Practicing mental math regularly to achieve fluency.
What mental strategies can help us add numbers within 20 more efficiently?
How can subtraction within 20 be simplified with mental math techniques?
Why is it important to know from memory all sums of two one-digit numbers by the end of Grade 2?
Students will fluently add and subtract within 20 using mental strategies.
By the end of Grade 2, students will know from memory all sums of two one-digit numbers.
Students can apply these skills in various real-life contexts, demonstrating understanding and speed.
2.OA.B.2 Fluently add and subtract within 20 using mental strategies. By end of Grade 2, know from memory all sums of two one-digit numbers.
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