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subtraction facts

Dr. Cotter on Addition and Subtraction Facts

December 27, 2023 by RightStart™ Math

Addition  Addition can be thought of as finding the whole when the parts are known. Place value greatly simplifies finding the sum of two numbers. To be efficient in adding, we start with the sums of numbers 1 + 1 through 9 + 9. These are best … [Read more...] about Dr. Cotter on Addition and Subtraction Facts

Filed Under: 2. Lessons, 3. Struggling Learner, 4. General Info, 6. Montessori Tagged With: addition, addition facts, dr. cotter, Dr. Joan A. Cotter, math, math facts, RightStart, RightStart Math, RightStart Mathematics, subtraction, subtraction facts

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