➕Finding the missing part is where addition and subtraction meet. These 40 worksheets come in two matching sets, within 10 and within 20, so the whole class practices the same skill at the right level.
You'll check out and download on Teachers Pay Teachers. Prices there may include a sale.
Missing Addend Worksheets is a differentiated addition practice set for kindergarten, 1st and 2nd grade that focuses on one powerful idea: if you know the whole and one part, you can find the other part. There are 40 worksheets in all, split evenly between sums within 10 and sums within 20.
Each worksheet type appears at both levels. Students find missing parts on dominoes, complete part-part-whole models, build numbers with ten frames, hop on a number line and solve missing number equations written three ways, including with the unknown first and with the equal sign on the left.
A Find the Missing Part anchor chart teaches three strategies students can choose from: counting on from the part they know, thinking of the problem as subtraction, and using a part-part-whole model. These strategies tie missing addends directly to fact families and early subtraction.
Practice goes beyond equations. Each level includes a word problem page, four Secret Word cut and paste pages that reveal a hidden word when solved, and a quick check to see who is ready to move on. Because the formats repeat across both levels, students can move up to bigger numbers without learning new directions.
A two-week teaching plan maps out the lessons, and answer keys are provided for every worksheet. The 49 black and white pages suit math centers, guided math, small groups, homework, intervention, early finishers, homeschool and sub plans.
📖 Teaching guide · 12 min readTeaching Missing Addends in K–2nd Grade: Count On, Think Subtraction and Part-Part-WholeRead the guide →Matching sets within 10 and within 20 make differentiation simple: the whole class can work on the same worksheet type at two levels. Visual models such as dominoes, ten frames and number lines come before abstract equations, so the strategy makes sense before it becomes fast.
Kindergarten, 1st and 2nd grade, plus intervention groups and homeschool.
There are 20 worksheets within 10 and 20 within 20, and every worksheet type appears at both levels.
The anchor chart covers Count On, Think Subtraction and the Part-Part-Whole model.
Yes, there is an answer key for every worksheet, along with a 2-week teaching plan.
🎨
Created byActivity Express40 differentiated fall color by code math pages: 5 pictures at 8 levels, from number match to addition, subtraction and doubles within 20.
🏎️
Created byActivity Express26 dice race game boards for K–2 addition and subtraction within 10 and 20, with strategy boards for doubles, make 10 and counting back, plus answer keys.
🕷️
Created byActivity ExpressA fall spider math craft for K–4: 35 differentiated leg sets from Make 10 to division, build-a-spider pieces, recording sheet and bulletin board letters.
🍬
Created byActivity ExpressCandy math mats for K–3: estimate, sort, graph, patterns, compare, add, subtract, fractions and arrays, with no-candy options for food restrictions.