Students who are efficient with the count-on, use-doubles, and make-ten strategies for addition have all they need to be proficient with subtraction number facts! Subtraction is the inverse, or opposite action, of addition. Both operations involve a part-part-total structure. In the example below, 1 and 3 are two parts that make up the number 4. Parts of … Continue reading Making Subtraction Efficient – Just Think Addition!
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