Add and Subtract Within 20 Task Cards (CCSS.2.OA.B.2)
These Addition and Subtraction (Within 20) Task cards contain 36 different cards for Grade 2 based on the Common Core State Standards. These cards can also be used at the end of 1st or as a review at the beginning of Grade 3.
Add and Subtract Within 20 Equation Task cards help with understanding of the meaning of the equal sign and require students to determine the unknown whole number in an addition or subtraction equation relating three whole numbers. These cards also help the students practice to fluently add and subtract within 20 using mental strategies.
These task cards can be used in learning centers, for independent review, or in a game setting. The cards can be printed in color or grayscale. For long term use, you will want to laminate the cards first or insert them into the pages of a small 4x6 photo album where students can write their answers directly on each page with a dry erase marker. You can use all cards in the set or just a section of the set. Addition is part of all of the odd-numbered cards. Subtraction is part of all of the even-numbered cards. The following Common Core standard is covered:
Add and subtract within 20.
CCSS.Math.Content.2.OA.B.2 Fluently add and subtract within 20 using mental strategies.2 By end of Grade 2, know from memory all sums of two one-digit numbers.
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