CCSS.MATH.CONTENT.1.OA.C.6
Add and subtract within 20, demonstrating fluency for addition and subtraction within 10. Use strategies such as counting on; making ten (e.g., 8 + 6 = 8 + 2 + 4 = 10 + 4 = 14); decomposing a number leading to a ten (e.g., 13 - 4 = 13 - 3 - 1 = 10 - 1 = 9); using the relationship between addition and subtraction (e.g., knowing that 8 + 4 = 12, one knows 12 - 8 = 4); and creating equivalent but easier or known sums (e.g., adding 6 + 7 by creating the known equivalent 6 + 6 + 1 = 12 + 1 = 13).
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Roll It! Operations Game
Use this fun game to practice all four operations and/or order of operations.
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Bump! Subtraction to 10 Math Game
Practice subtraction facts to 10 with a fun printable subtraction board game.
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Addition Strategies Cheat Sheet
Help students understand the different addition strategies with this helpful cheat sheet.
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Tens Frame - Addition and Subtraction Match-Up Activity
Build addition and subtraction skills with two tens frame matching games.
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Dinosaur Math - Addition and Subtraction (Version 2)
Solve the addition and subtraction number sentences to color the dinosaur.
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Find 20 Addition Strategy Task Cards
Practice finding 20 with this set of linking cube task cards.
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Making Ten Activity
Practice making 10 using objects, pictorial models, and number sentences with this activity mat.
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Double Dinos - Using Doubles Facts to Add Near Doubles Worksheet
Practice the “near doubles” addition strategy to solve addition problems to 20.
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Bar Model Subtraction - Math Color By Number Worksheet
Bring a bit of spooky math fun into the classroom with a Halloween color by number worksheet focused on subtraction using a bar model.
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Addition to 20 Activity - Winter Math Puzzle for 1st Grade
Practice addition facts up to 20 with a printable winter math puzzle for kindergarten and first-grade students.
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Feed the Pumpkins - 1st Grade Subtraction Worksheet
Feed the pumpkins and practice subtraction to twenty with a Halloween subtraction worksheet.
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Subtraction Tarsia Worksheets- Math Puzzles
Print a set of 7 Tarsia puzzles to practice solving single-to-multi-digit subtraction problems.
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Making Monsters Subtraction - Halloween Math Worksheet
Have some spooky subtraction fun with three differentiated Halloween subtraction worksheets.
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Math Graphic Organizers - Printable Work Mats
Practice working on specific math concepts with our set of 5 printable math graphic organizers.
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Addition and Subtraction Work Mat
Practice addition and subtraction concepts daily with a printable work mat for students.
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Subtraction within 20 - Color by Number Worksheet
Reveal the mystery picture by solving the subtraction problems with a color-by-number worksheet.
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Decomposing Numbers – Word Problem Worksheet
Challenge students to decompose numbers presented in a word problem by rearranging the parts and showing different combinations.
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Counting On with Number Bonds – Worksheet
Begin from the larger number and count on to find the total with this worksheet.
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Back to School Supply Shopping Task - Primary Grades
Calculate the cost of school supplies and answer questions with this back-to-school math activity.
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Addition Strategies: Base-Ten Blocks Worksheet
Practice using the strategy of using base-10 blocks and regrouping to find the sum.
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Ten Frame Mats (Single and Double)
A ten frame mat and a double ten frame mat to use in a variety of ways.
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Addition Strategy - Counting On Worksheet
Solve addition problems in this 2-page Counting On Addition Worksheet.
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Number Talks - Balancing Equations Task Cards
Build number sense skills with this set of 40 task cards.
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MLK Day Hidden Message - Lower Grades
Practice addition and subtraction facts within 20 to uncover a meaningful quote.
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Missing Addend Picture Puzzle – Level 1
Solve the missing addition sentence by matching the addend with its equation, completing the puzzle.
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Open-Ended Math Problem Solving - Grades 1, 2, and 3 (PowerPoint Version)
A PowerPoint with 20 open-ended problem solving questions covering a range of mathematical concepts.
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Picture Addition Worksheet
A worksheet to practice the addition strategy of counting on.
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Taking From 10 - Number Facts Board Game
Practice the "Taking from 10" subtraction strategy with this board game.
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Combinations of 10 and 20 Posters
Easily recognize combinations of 10 and combinations of 20 with this visual poster set.
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Part Part Whole Word Problem Task Cards and Worksheet
Explore these animal-themed part-part-whole word problems that will open discussions with your young mathematicians.
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Bridge to Ten Addition Strategy Task Cards
Help students quickly bridge to ten to assist with their addition strategies using linking cubes.
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Rainbow Number Facts (Making 10) - Board Game
Practice the addition strategy of making ten with this board game.