Subtraction Within 20 Bundle

by Jennifer Bates

Price: 650 points or $6.5 USD

Subjects: math

Grades: 13,1,2

Description: This bundle includes 4 decks of 20 cards each. Students are asked to click on the answer to each equation. Two of the decks include missing subtrahend equations. Add and subtract within 20. CCSS.MATH.CONTENT.1.OA.C.5 Relate counting to addition and subtraction CCSS.MATH.CONTENT.1.OA.C.6 Add and subtract within 20, demonstrating fluency for addition and subtraction within 10. CCSS.MATH.CONTENT.1.OA.B.4 Understand subtraction as an unknown-addend problem. CCSS.MATH.CONTENT.1.OA.D.8 Determine the unknown whole number in an addition or subtraction equation relating three whole numbers. CCSS.MATH.CONTENT.2.OA.B.2 Fluently add and subtract within 20 using mental strategies. By end of Grade 2, know from memory all sums of two one-digit numbers.