Grade 1 word problems for adding and subtracting within 20 turn math facts into real stories about crayons, cookies, and classroom objects. First graders learn to read carefully, find the numbers, decide whether to add or subtract, and write a complete answer.
The biggest stumbling blocks are choosing the wrong operation when key words like 'in all' or 'how many are left' are missed, and forgetting to label the answer. This skill builds on Kindergarten counting and addition within 10, and prepares first graders for two-digit problems and multi-step stories in Grade 2.
Our addition and subtraction word problems within 20 worksheets give kids guided practice with story setups, key word clues, and unknown-position problems so they can move from finger counting to confident mental math. Each page mixes solving, key word matching, and short reasoning checks to lock in the steps. By the end, first graders can read a problem once, picture it, choose the right operation, and check that the answer makes sense.
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Word Problems: Add & Subtract Within 20
Word Problems: Add & Subtract Within 20
Addition & Subtraction Word Problems Within 20
Addition & Subtraction Word Problems Within 20
Word Problems: Add & Subtract Within 20
Word Problems: Add & Subtract Within 20
Addition & Subtraction Word Problems Within 20
Addition & Subtraction Word Problems Within 20
Word Problems: Add & Subtract Within 20
Word Problems: Add & Subtract Within 20
Addition & Subtraction Word Problems Within 20
Addition & Subtraction Word Problems Within 20
What's Included in This Download
What You'll Learn
These word problems: add & subtract within 20 worksheets help grade 1 students develop essential math skills through engaging activities.
Learning Objectives
- Addition word problems
- Joining stories
- Combining groups
- Problem solving within 10
Skills Covered
How to Use These Worksheets
- Download & Print: Click the download button to get the PDF. Print on standard 8.5" x 11" paper.
- Start Simple: Begin with easier pages before moving to more challenging activities.
- Daily Practice: Dedicate 10-15 minutes each day for consistent learning.
- Use Manipulatives: Pair worksheets with physical objects like blocks or counters.
- Provide Encouragement: Celebrate progress and effort to build confidence.
- Check Progress: Use the included answer key to review work together.
Common Mistakes to Watch For
- Picking the wrong operation because they only look at the numbers, not the story — for example, adding when the problem says someone 'gave away' or 'ate' part of the group.
- Forgetting that 'how many more' is a comparison subtraction, so they add the two amounts instead of finding the difference between the two groups.
- Skipping the second step in two-step problems and stopping after the first calculation, which leaves the final answer wrong even when the first piece of math is correct.
Frequently Asked Questions
What key words tell my first grader to add or subtract?
Phrases like 'in all,' 'altogether,' and 'how many together' usually mean add. 'How many are left,' 'gave away,' and 'how many more' usually mean subtract. Our easy and medium sheets practice each phrase directly so kids learn to spot the clue word before they write the equation.
Why do these worksheets stay within 20?
First graders are still building number sense and learning to count on and back fluently. Keeping every problem within 20 means children can solve with fingers, ten frames, or mental strategies and focus on understanding the story rather than struggling with big numbers. Larger ranges come in Grade 2.
What is a two-step word problem and when do first graders meet it?
A two-step problem needs two operations to find the answer, like 'Ava has 8 beads, finds 6 more, then gives 3 away.' These appear on the Hard-1 sheet. They prepare children for the multi-step stories that are central to Grade 2 math word problems.
What does 'unknowns in different positions' mean on Hard-2?
Most early problems hide the answer at the end, like 6 + 8 = ?. Hard-2 also hides the start or the change, like ? + 6 = 14 or 16 - ? = 9. Solving these strengthens algebraic thinking and shows kids that subtraction and addition undo each other.
How can I help my child show their work on a word problem?
Encourage them to underline the numbers, circle the key word, draw a quick picture or ten frame, and then write the equation. The Hard sheets include a Show Your Work box that models this routine, so kids learn a habit they can use on any word problem.
Are these worksheets really free?
Yes! All our worksheets are 100% free to download and print. There's no subscription, no hidden fees, and no registration required.
Can I use these in my classroom?
Absolutely! Teachers are welcome to print and use these worksheets in their classrooms. Make as many copies as needed for your students.