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Combine with Critter Subtraction Essentials Levels 2 and 3 to cover all the math facts for subtracting the numbers 0 through 12 from whole numbers up to 12. Math Superstars Subtraction Level 1 by Robert Stanek.
When you click on links to various merchants on this site and make a purchase, this can result in this site earning a commission. Affiliate programs and affiliations include, but are not limited to, the eBay Partner Network.