Operations & Algebra: "Subtracting within 20"
ABOUT THIS LESSON: Math Operations and Algebraic Thinking, 1st Grade

Lesson 4 of 5.  Students will perform subtraction problems in which the beginning number is not larger than 20. The worksheets include one problems page, an answer page with a number bank and a standard answer page. *
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ABOUT THE AUTHOR: Elizabeth Sweet has taught grades 3-5 since 2003. Her awards include County Teacher of the Year (2015). When she’s not busy teaching 4th grade in the American public school system, she enjoys baking, reading, knitting and exploring nature.

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