Practice Addition Within 20
Master addition strategies including counting on, making ten, and doubles facts. Custom worksheets with visual supports for first grade learners.
Addition in first grade looks simple – combining small numbers. But underneath is a critical shift: moving from counting everything to using strategies. A child who adds 5+3 by counting "1,2,3,4,5,6,7,8" is still thinking like a kindergartner. The first grade goal is to count on: "5...6,7,8." That small shift – starting from the larger number – is the foundation of efficient calculation.
Our addition worksheets are designed to build these strategies systematically. Visual supports help children see what numbers mean. Three difficulty levels let you start where your child is comfortable. And word problems teach children to recognize when addition is needed in real situations. The first grade math hub offers more resources for a complete curriculum.
Teach these strategies in order for the best results
Start with the larger number and count up. For 8+3, say "8...9,10,11." This is faster than counting from 1 and builds mental math skills.
Memorize doubles (6+6=12). Then 6+7 becomes "double 6 plus 1" = 13. This strategy works for many facts.
For 8+5, think: "8 needs 2 to make 10, take 2 from 5 leaves 3, so 10+3=13." This is the most powerful strategy.
Numbers 1-10, sums within 10. Perfect for beginners building confidence.
Numbers 1-15, sums within 15. Great for applying strategies.
Numbers 1-20, sums within 20. For end-of-year mastery.
For some children, the gap isn't in practice — it's in the underlying number sense that makes addition and subtraction intuitive. If your child is still counting on fingers for every fact past mid-year, struggles to understand teen numbers, or can't explain their thinking, worksheets alone won't bridge that gap. Our Number Sense Foundations course (K–2) builds the conceptual groundwork that makes fact fluency stick.
View Number Sense Foundations — $57Everything you need to know about teaching first grade addition
By the end of first grade, students should be able to add fluently within 10 and use strategies to add within 20. This includes knowing doubles facts (6+6=12), making ten (8+5 = 8+2+3 = 13), and counting on from the larger number. The goal is not just speed but understanding why these strategies work. Most children master addition within 10 by mid-year and within 20 by the end of first grade.
Making ten is the most important addition strategy in first grade. When a child sees 8 + 5, they learn to think: "8 needs 2 to make 10, so I take 2 from 5, leaving 3. Now I have 10 + 3 = 13." This strategy builds number sense and is the foundation for regrouping in 2nd grade addition. Children who master making ten in 1st grade find 2-digit addition much easier later.
Finger counting is normal in early first grade, but the goal is to move beyond it. By mid-first grade, children should be using mental strategies like counting on from the larger number. If your child is still counting from 1 for every problem (e.g., counting 1,2,3,4,5,6,7,8 for 5+3), gently teach them to start at the larger number and count up. The worksheets here use visual supports to bridge from concrete counting to mental math.
For addition practice, 10-15 focused problems per day is plenty. Quality matters more than quantity. A child who does 10 problems using good strategies learns more than a child who does 30 problems by counting slowly on fingers. Use our generator to create mixed practice: some problems for strategy work, some for fluency, and some word problems to apply the skill.
Addition within 10 means both numbers and the sum are 10 or less (e.g., 4+3=7, 6+2=8). Addition within 20 means sums up to 20 (e.g., 9+8=17, 7+6=13). First graders should master within 10 first, then extend to within 20. Our Easy difficulty focuses on 1-10, Medium on 1-15, and Hard on 1-20, so you can meet your child where they are.
Yes. Start with +0 and +1 facts (these are easy and build confidence). Then teach doubles (1+1 through 10+10) – children love patterns. Next teach near-doubles (6+7 is double 6 plus 1). Then teach making ten facts (8+3, 9+4, etc.). Finally, teach remaining facts. This order builds on previously learned strategies rather than presenting all facts as isolated memorization.
Mastery means your child can: 1) solve addition within 10 without counting on fingers, 2) explain a strategy (e.g., "I know 8+5 is 13 because 8+2=10 and 3 more is 13"), 3) solve simple addition word problems, and 4) recognize that addition is commutative (5+3 is the same as 3+5). Speed will come with practice – focus on understanding first, then fluency.
Doubles facts are problems like 2+2=4, 3+3=6, up to 10+10=20. They are important because they become anchors for other facts. Once a child knows 6+6=12, they can figure out 6+7 is "double 6 plus 1" or 13. Doubles are also the easiest facts to memorize because they have a natural pattern. Most children master doubles quickly, which builds confidence for harder facts.
Generate custom addition worksheets for your first grader. Choose difficulty, problem types, and download clean PDFs with answer keys.
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