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This book contains 41 worksheets with appoximately 50 problems on each sheet for drill. The drills in this book are for numbers 0 to 20 and only addition and subtraction are included. Some problems appear more than once, but that is the purpose of the book. Drill! A child is supposed to work the problems out in his or her own head. The problems should not be worked out on paper, nor should a calculator be used. If you want to sharpen your math skills or if you want your children to be a quick and accurate number expert, this book is for you. Examples from the book: 8+7=? 9+2-7=? 5+___? ___=8
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Book Description CreateSpace Independent Publishing Platform, 2011. Condition: New. book. Seller Inventory # M146118889X
Book Description CreateSpace Independent Publis, 2011. Paperback. Condition: New. Never used!. Seller Inventory # P11146118889X
Book Description CreateSpace Independent Publis, 2011. Paperback. Condition: New. Brand New!. Seller Inventory # VIB146118889X