Addition Worksheets Within 20
Help your student move from counting every object to counting on or making ten.
Teaching notes for parents and teachers
How to teach it
Start with eight counters, then add five. Model counting on from eight, and show how moving two of the new counters makes a group of ten.
Example to work through together
Use the model below as you explain the example. Have your student point to the quantities as you discuss them.
9 → 10 → 11 → 12 → 13
Five counting steps lead to 13, so 8 + 5 = 13.
Ask your student
Which two counters could we move to make ten?
If your student needs help
If the student counts eight as the first new counter, point to the next counter and say nine. Have them count the five added counters again.
Make a practice set
Select the worksheet, answer key, or both. When both are selected, the answer key prints after the questions. Keep it separate if you want your student to work independently.
After your student finishes
Ask the child to choose one answer and explain it another way. For 8 + 5, they might make ten or count on. If an answer is incorrect, look for a skipped counting step before asking them to start the whole page again. The answer key gives totals; drawings and strategies may differ.
Picture activityPicture Addition Worksheets
Count two groups of pictures and write the matching addition equation.
5 problems · Answer key included
Calculation practice2 Digit Addition Without Regrouping
Add tens to tens and ones to ones without exchanging ten ones.
15 problems · Answer key included
Missing-number practiceMissing Addend Worksheets Within 20
Find the missing part of an addition equation; use counting on or subtraction.
12 problems · Answer key included
Calculation practice2 Digit Addition With Regrouping
Exchange ten ones for a ten and keep the total within 100.
15 problems · Answer key included
Word problemsAddition and Subtraction Word Problems Within 20
Read joining and taking-away stories, choose an equation, and answer in context.
6 problems · Answer key included
Word problemsMore and Fewer Comparison Word Problems
Identify the known amount and compare two people’s collections.
6 problems · Answer key included
Word problemsWord Problems With Extra Information
Choose the useful quantities instead of calculating with every number.
4 problems · Answer key included
Word problemsAddition & Subtraction Word Problems Within 100
Choose an operation for a joining or taking-away story, then solve within 100.
6 problems · Answer key included
Calculation practiceAddition & Subtraction Within 1,000
Use hundreds, tens, and ones to add or subtract, with room to show your strategy.
12 problems · Answer key included
Word problemsAddition and Subtraction Word Problems Within 1,000
Explain a joining or taking-away situation and check the calculation with place value.
6 problems · Answer key included
Word problemsChoose an Equation Word Problems
Decide whether addition or subtraction finds the missing quantity in the story.
4 problems · Answer key included
Word problemsBar Model Word Problems
Use a whole-and-parts diagram to find the total, the starting amount, or the amount used.
4 problems · Answer key included
Word problemsSame Numbers, Different Questions Word Problems
Compare two stories with the same numbers: find the new total in one and the starting amount in the other.
2 pairs · 4 word problems · Answer key included
Word problemsWrite Your Own Question Word Problems
Write a question about the total, then answer it with an addition equation using whole dollars.
4 problems · Answer key included
Word problemsMulti-Digit Addition and Subtraction Word Problems
Add and subtract cable lengths within 1,000,000 and label the answer in feet.
4 problems · Answer key included
Word problemsAdding and Subtracting Decimals Word Problems
Combine cable lengths or find what remains, using place value through hundredths.
4 problems · Answer key included
Calculation practiceAdding Decimals to Hundredths Worksheets
Align decimal points and exchange ten hundredths for one tenth.
15 problems · Answer key included
Picture activityKindergarten Addition and Subtraction Within 5
Count and combine pictures, or cross out the amount taken away.
6 problems · Answer key included
Word problemsKindergarten Word Problems Within 5
Listen to a short story, act it out, and draw or write an answer within 5.
4 problems · Answer key included
Draw and count activityMaking 10 with Ten Frames Worksheets
Draw a dot in each empty box, then write how many more make 10. Start with 5–9 pictures in a two-row frame.
4 problems · Answer key included
Missing number and drawing activityMake 10 Missing Addend Worksheets
Find the missing part in an addition equation that totals 10. Use the drawing space or counters to explain your answer.
4 problems · Answer key included
Circle and split picture groupsMissing Part Number Bonds Worksheets Within 9
Circle part of a group and complete the number bond. Choose two nonempty parts or one empty part (0). Empty-part practice also includes wholes of 1 or 10.
4 problems · Answer key included
Word problemsAdding Four 2 Digit Numbers Word Problems
Combine four boxes of counters. Pair friendly sums or add tens and ones, keeping every box in the total.
4 problems · Answer key included
Word problemsAdding and Subtracting Tens Word Problems
Combine or remove whole tens of counters. Explain the place value, including stories where zero counters change or remain.
4 problems · Answer key included
Word problems2 Digit Plus 1 Digit Addition Word Problems
Add 0–9 more counters to a two-digit collection. Count on, add the ones, or make the next ten; sums stay below 100.
4 problems · Answer key included
Word problemsKindergarten Word Problems Within 10
Listen, move counters, and draw joining or taking-away stories with amounts up to 10.
4 problems · Answer key included
Word problemsTwo-Step Addition and Subtraction Word Problems
Find a new total, then subtract what is given away. Follow both changes with small numbers.
4 problems · Answer key included
Word problemsMissing Decimal Part Word Problems
Find a missing decimal amount through hundredths. Align place values and check by adding the parts.
4 problems · Answer key included
Word problemsHow Many More? Word Problems Within 20
Find the amount to add to reach a target. Fill the empty spaces and check the missing part.
4 problems · Answer key included
Calculation practiceTrue or False Addition Equations
Compare both sides of an addition equation and explain whether they match.
6 problems · Answer key included
More about addition · Grade 1 worksheets
Grade 1 selected skill connection: 1.OA.C.6. See the Common Core standards for this grade. This worksheet does not cover every requirement in the standard.