Stepping Into Two-Digit Territory
Adding within 20 is the bridge between simple single-digit math and more complex computation. This free printable addition worksheet gives first graders aged 5 and up the practice they need with sums like 8 + 7, 12 + 5, and 9 + 11. Every problem is carefully designed so the answer never exceeds 20, allowing children to build confidence gradually. The worksheet includes a mix of easier and more challenging problems so every child finds their entry point.
Why "Making Ten" Changes Everything
The most powerful strategy for adding within 20 is "making ten" — breaking apart one number to fill the other up to ten, then adding what's left. For example, 8 + 5 becomes 8 + 2 + 3, which is 10 + 3 = 13. This decomposition technique is taught worldwide because it builds number flexibility and mental math stamina. Our worksheet provides the repetition kids need to internalize this strategy naturally, moving from finger-counting to confident mental computation.
Supporting Your Child at Home
If your child struggles, use a number line from 1 to 20 — they can place a finger on the first number and "hop" forward to find the sum. Ten-frame cards are another excellent visual tool: fill two frames to show how numbers combine past ten. After mastering this worksheet, reinforce the skills with our handwriting worksheets where children practice writing number words like "eleven" and "fifteen." Our reading comprehension sets also feature math-themed passages that connect arithmetic to literacy.
Continue Learning With LearnySprout
Once addition within 20 feels effortless, your child can tackle subtraction within 20 to learn the inverse operation, or try mixed addition and subtraction for the ultimate challenge. LearnySprout's math worksheet generator lets you create custom sheets with exactly the range you need. For a creative reward after math practice, explore our coloring books or play through a word search puzzle. Everything on LearnySprout is free to download and print!