Two-Digit Addition and Subtraction (J)
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In this addition and subtraction learning exercise, 1st graders enhance their math skills by solving the 49 2-digit addition and subtraction problems.
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Grade 1 Supplement Set A4 Number & Operations: Equivalent Names
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Understanding the inverse relationship between addition and subtraction is essential for developing fluency in young mathematicians. Zoe and RJ explain how three numbers can form fact families that make two addition and two subtraction...
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