Addition and Subtraction Word Problems (to 20)

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1st Grade Addition Subtraction Word Problems within 20 GameFirst Grade Word Problem Adding Subtracting up to Twenty Game

Interactive Math Lesson - Addition and Subtraction Word Problems within 20

Your first-grade students will master addition and subtraction word problems within twenty in this interactive math practice game. Word problems give students the opportunity to put their addition and subtraction skills to the test in real-life scenarios. After going through this online math practice activity, your students will become more confident in their ability to correctly solve a variety of addition and subtraction word problems.

Here are some examples of the types of word problems your students can expect to solve in this online math game. "Sophia and her brothers each have 9 books. How many books do they have all together?" "Eliza picked 13 flowers. 8 of them were dandelions. How many of them were not dandelions?" "Brynn set a goal to read 17 books over the summer. So far, she has read 9. How many more books does she need to read?" These and similar word problems will test your students' knowledge of addition and subtraction within twenty.

Several features are available in I Know It math practice activities to help children make the most of their practice sessions. A "Hint" button offers a practical clue to point students in the right direction when they become stuck on a math problem. A detailed explanation page offers step-by-step instructions when students answer a question incorrectly to help them learn from their mistakes. The progress-tracker in the upper-right corner of the practice screen shows students how many questions they have answered out of the total number of questions in the math lesson. A score-tracker informs students how many questions they have answered correctly so far. Plus, a read-aloud button allows children to hear the math problem read out loud to them in a clear voice—a handy tool for ESL/ELL learners or students who are auditory processors.

1st Grade Addition Subtraction Word Problems within 20 LessonFirst Grade Word Problem Adding Subtracting up to Twenty Lesson

Why Educators Choose I Know It

Teachers and students alike enjoy using the I Know It online math program to supplement their comprehensive math curriculum. Educators appreciate the wide selection of math practice activities we offer in kindergarten through fifth grade. All math lessons on I Know It are aligned to the Common Core Standard. Our site is organized by grade level and math topic, making it easy for you to find exactly what you want right when you need it!

Students, too, enjoy sharpening their math skills with our fun, interactive practice activities. Children jump into math practice on I Know It with enthusiasm because our math activities present as fun, yet challenging, math games. Students are cheered on in their math practice by silly animated characters and lots of positive reinforcement messages. They can even earn awards for their math practice to add to their "trophy case" so you can celebrate their achievements as a class!

We hope you will give this first-grade word problems lesson a try today! Be sure to explore the hundreds of math lessons in our online collection too!

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When you sign up for a free sixty-day trial of, you will have unlimited access to all math lessons on our website for a full sixty days - no credit card required! We are confident you and your students will love the difference interactive math practice can make, so when your free trial runs out, we encourage you to go ahead and register as a member of the I Know It community. This way, you can continue to enjoy the benefits of interactive math practice for a full calendar year!

Your I Know It membership unlocks the website's handy administrative features, which help you to monitor your students' math practice easily and efficiently. Create a class roster and add your students to it, assign unique usernames and passwords to all your students, give different lesson assignments to individual students, monitor student progress with detailed progress reports, change basic lesson settings, print, download, and email student progress reports, and much more!

Your students will log into a kid-friendly version of the I Know It homepage with their unique username and password. From here, they can access the math practice activities you have assigned to them. You may also wish to give them permission to explore other math topics at their grade level, or even challenge themselves to try out math practice activities at other grade levels. These options are available to you in your teacher administrator account. Grade levels in the student mode of the program are labeled with letters instead of numbers (i.e. "Level A" for first grade), making it easy for you to assign math lessons based on each child's skill level.

1st Grade Addition Subtraction Word Problems within 20 ActivityFirst Grade Word Problem Adding Subtracting up to Twenty Activity


This interactive math lesson is classified as Level A. It may be ideal for first grade students.

Common Core Standard

1.OA.2, MA.1.NSO.2.2, MA.2.AR.1.1, 1.5D
Operations And Algebraic Thinking

Represent And Solve Problems Involving Addition And Subtraction.
Solve word problems that call for addition of three whole numbers whose sum is less than or equal to 20, e.g., by using objects, drawings, and equations with a symbol for the unknown number to represent the problem.

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