Use these 20 task cards to practice adding and subtracting within 20 (plus 3 additional cards adding/subtracting up to 25). Students can practice while putting the puzzles together.
Common Core Standards:
1.OA.6 – Add and subtract within 20, demonstrating fluency for addition and subtraction within 10
2.OA.2 – Fluently add and subtract within 20 using mental strategies.
Practice Standards Addressed:
MP1 – Make sense of problems and persevere in solving them
MP2 – Reason abstractly and quantitatively
MP3 – Construct viable arguments and critique the reasoning of others
MP6 – Attend to precision
MP7 – Look for and make use of structure
MP8 – Look for and express regularity in repeated reasoning