1st Grade Addition Worksheets

These worksheets introduce students to the foundational concepts of addition. Activities include matching pictures to addition sentences, identifying number pairs that make 10, breaking apart two-digit numbers into tens and ones, and counting up and down within 20. Designed primarily for kindergarten and first grade, these resources help young learners connect visual representations to number sentences and build early number sense before moving on to traditional addition problems.

Practice standard addition problems ranging from simple sums within 5 all the way up to four-digit plus four-digit addition. Worksheets are available in both vertical and horizontal formats and cover key skills like regrouping (carrying), adding multiples of ten, finding missing addends, and solving mixed addition and subtraction problems. These resources align with Common Core standards from kindergarten through fourth grade, giving students structured practice at every level.

Word problems help students apply addition skills to real-life situations. These worksheets present short story problems where students identify the important numbers, choose the right operation, and write a number sentence to find the answer. Problem sets are available at three difficulty levels — within 10, within 20, and within 100 — making them suitable for kindergarten through second grade.

When students are ready to add more than two numbers at once, these worksheets provide the practice they need. Activities range from adding three single-digit numbers with sums under 20 to adding three and four two-digit numbers with regrouping. Word problem versions are also included, where students pull key numbers from a story and add multiple three-digit addends. These worksheets align with first through third grade Common Core standards.

Beyond memorizing facts, students need strategies to add efficiently. These worksheets cover key techniques including making a ten, using open and closed number lines, finding equivalent addition problems, identifying missing digits, estimating sums with rounding, and breaking numbers apart by place value. These strategy-based activities help students build flexible thinking and mental math skills that support fluency with larger numbers.

Timed drills build speed and accuracy with basic addition facts. Each worksheet contains 50 to 100 problems focused on a specific fact family — from 0s through 10s — plus mixed fact sets that combine all families. Additional drill sheets cover adding and subtracting within 20, finding ten more and ten less, adding 9s using mental math shortcuts, and adding to reach multiples of ten. These are ideal for daily warm-ups, fact fluency practice, or timed assessments.