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Check Subtraction with Addition
In this subtraction activity, students subtract, then check by adding. Problems are set up side by side, with the correct answer to the addition check noted for the student.
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Grade 1 Supplement Set A3 - Number & Operations: Addition & Subtraction on the Number Line
Hop your way through a mathematical equation with your first grade class as they learn the idea of moving up and down the number line. Adding and subtracting like little frogs is an engaging and clever way to teach/reinforce this concept.
K - 2nd Math CCSS: Adaptable