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# Math Fluency

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### Math Fluency

1. 1. FluencywithBasic Addition80 September 2011 • teaching children mathematics www.nctm.org Copyright © 2011 The National Council of Teachers of Mathematics, Inc. www.nctm.org. All rights reserved. This material may not be copied or distributed electronically or in any other format without written permission from NCTM.
4. 4. When students master two types of facts—doubles and combinations thatTABLe 1 make 10—they can derive nearly every other challenging fact on this table. “Duplicates” if students understand Near doubles (doubles the commutative property ±1 or 2) Relates to the meaning of addition Combinations of 10 or counting sequence Pairs that are near 10 or easy to Doubles count on or back to 10When working with elementary school teachers to emerge, helping us recognize crucial strate-on this idea, I often have them sort different fact gies for mastering basic facts. I highlight thesecards into piles on the basis of strategies they strategies in our discussion, using table 1 to helpwould use to solve them. An analysis of different illustrate these ideas.sorting schemes allows several striking patterns By focusing on patterns that arise from thewww.nctm.org teaching children mathematics • September 2011 83