Addition Facts With 8 and 9 Worksheets

About This Worksheet Collection

The Addition Facts With 8 and 9 Worksheets collection is designed to help students gain confidence with some of the trickiest basic facts in early arithmetic. By concentrating specifically on +8 and +9 in a range of formats, these pages give learners the focused repetition they need to move from slow counting to quick, reliable recall. Vertical and horizontal layouts, mixed-fact drills, and extensions into two-digit numbers all work together to support both accuracy and flexibility in computation.

As students progress through the collection, they practice aligning numbers correctly, using mental strategies such as "make a ten" and "add 10 then subtract 1," and applying single-digit facts to increasingly larger numbers. They strengthen place-value understanding while developing fluency within 20 and within 100. These worksheets can be used for warm-ups, homework, small-group intervention, or independent practice, giving teachers flexible tools for building solid addition fluency.

Detailed Descriptions Of These Worksheets

Add Eight Practice
Students solve vertical equations that all involve adding eight to different single-digit numbers. The consistent format encourages neat alignment and helps learners focus on building automatic recall of +8 facts. As they work, students notice patterns and begin to rely more on mental strategies than on counting one by one. This worksheet is well suited for independent practice, quick checks, or homework reinforcement.

Add Nine Practice
This worksheet has students add nine to a variety of single-digit numbers using a clean vertical layout. Repetition helps them internalize efficient strategies such as "add 10 and subtract 1." Learners strengthen both accuracy and speed while gaining confidence with +9 facts.

Mixed 8 and 9 Addition
Students alternate between +8 and +9 vertical problems, which requires careful attention to the addend in each equation. This mixed format builds mental flexibility and prevents learners from going on "autopilot." Over time, students sharpen their fact-retrieval skills and deepen their understanding of how these larger single-digit addends behave. The page supports stronger number sense and readiness for multi-digit addition.

Addition With Larger Numbers
In this worksheet, students add eight or nine to a range of two-digit numbers using vertical equations. Some problems require regrouping, giving learners meaningful practice with carrying while still leaning on familiar basic facts. The activity reinforces place-value understanding by showing how adding just one digit can change both ones and tens. It serves as an important bridge between simple fact practice and broader addition within 100.

Two-Digit Addition Practice
Students continue working with +8 and +9, now consistently paired with two-digit numbers. Many items involve regrouping, helping learners grow comfortable with carrying in context. The vertical format keeps digits aligned and encourages organized work. This worksheet builds accuracy and confidence with multi-digit addition that still highlights the role of basic facts.

Regrouping Addition Facts
This page focuses on adding eight and nine to two-digit numbers where regrouping frequently occurs. Learners must apply their fact knowledge while tracking changes across tens and ones. The consistent layout supports careful alignment and reduces visual distractions, so students can concentrate on procedure. By the end, they gain stronger fluency with both place value and multi-digit computation.

Horizontal 8 and 9 Addition
Students return to basic facts but see them written horizontally, which encourages true mental computation. They solve single-digit equations involving +8 and +9, recording sums in simple answer spaces. This practice strengthens quick recall and reinforces patterns they may have noticed in earlier vertical work. It's ideal for timed drills or short fluency bursts.

Add Nine Horizontal Practice
This worksheet extends +9 practice to two-digit numbers written in horizontal format. Students are encouraged to use mental strategies-like rounding to the nearest ten and adjusting-to find sums efficiently. Many problems require regrouping, which further strengthens place-value fluency. The page supports the development of both speed and thoughtful strategy use.

Mixed Nine Addition Sets
Students solve a range of horizontal problems where nine is added to different two-digit numbers. The repeated focus on +9 helps them refine tens-based mental math approaches. A variety of addends invites them to generalize their strategies, not just memorize isolated facts. This worksheet builds stamina, accuracy, and confidence with mental addition within 100.

Vertical Double-Digit Addition
Learners practice adding eight and nine to two-digit numbers using horizontal equations that still emphasize place-value thinking. They compute sums while paying attention to how regrouping works behind the scenes. The clear, consistent format makes it easy to spot and correct errors. The page supports a smooth transition from basic facts to more sophisticated multi-digit work.

Horizontal Addition Facts
Students work through horizontal equations that pair eight or nine with single-digit addends. They compute each sum mentally, reinforcing fluency within 20. As they practice, they become more comfortable recognizing and using number patterns tied to these larger addends. The worksheet's simple design makes it perfect for warm-ups or quick skill checks.

Mixed Addition Equations
This worksheet offers another set of horizontal equations featuring both +8 and +9 with single-digit numbers. The mix keeps students alert and encourages careful reading of each problem. Repeated exposure builds automatic recall while still challenging their mental flexibility. It's a strong option for independent practice or small-group fluency work.

Vertical Add Eight
Students focus solely on adding eight to single-digit numbers using structured vertical equations. Boxed answer spaces guide alignment and promote neat, accurate writing. With each problem, learners strengthen both their understanding of +8 facts and their comfort with vertical layouts. This targeted practice supports confident early computation.

Vertical Add Nine
This worksheet gives concentrated practice with +9 facts in vertical form. Students benefit from clear number placement and repeated opportunities to apply mental strategies like "add 10 minus 1." Over time, they increase their speed and reliability with these challenging facts. The consistent structure encourages independence and reduces cognitive load.

Mixed Vertical Addition
Students tackle a blend of +8 and +9 vertical problems, switching back and forth between the two addends. This format promotes strong fact fluency and reinforces careful attention to each equation. Learners practice aligning digits, carrying when needed, and applying appropriate mental strategies. The worksheet helps solidify foundational number sense that will support more advanced math learning.