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Fast Subtraction
Simple subtraction with 2 operands. For examp le, 9-5, 5-2, etc. The focus here is to build up speed.
This topic aligns to the following state standards
Grade 1: Num 1.1.1 Identify and model basic addition facts (sums through 10) and the corresponding subtraction facts.
Grade 2: Num 1.2.1 Identify and model basic addition facts (sums to 18) and the corresponding subtraction facts; immediately recall basic addition facts (sums through 10) and the corresponding subtraction facts.
Grade 3: Num 1.3.1 Immediately recall and use addition and subtraction facts and multiplication facts to 81.
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