Have you heard of the -1 strategy also known as constant difference? Why it works: Since you subtract 1 from both numbers, the difference remains the same. Ways to use: 1. As a way for students to check their regrouping work 2. Another math strategy to add to their tool kit Let me know what other math strategy you want to see in action 💕👇🏽 | Yourteacherbestie
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Have you heard of the -1 strategy also known as constant difference? Why it works: Since you subtract 1 from both numbers, the difference remains the same. Ways to use: 1. As a way for students to check their regrouping work 2. Another math strategy to add to their tool kit Let me know what other math strategy you want to see in action 💕👇🏽 | Yourteacherbestie
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