Iknowit Logo
Grade Tag

Missing Numbers to 20 (Subtraction)

great job
scratch pad
submit button
Time
Progress
Score
0
toggle button
Times up!
Times up! You may finish answering the current question and then proceed to your score!
hint label
Sorry, you have used all of your available hints for this lesson.
Sketch Pad
Alert
Practice Limit Reached

You've reached your daily practice limit of 12 questions.

When you sign up for a free account and login, you can play all you'd like.

(Must be 18 years old to sign up.)

Award Information
Awarded to
hint label
Question Hint
Student Log In
Choose Family Member
Browse Math lessons in each grade level
Kindergarten Math Online Math Lessons
Grade 1 Math Online Math Lessons
Grade 2 Math Online Math Lessons
Grade 3 Math Online Math Lessons
Grade 4 Math Online Math Lessons
Grade 5 Math Online Math Lessons
iKnowIt.com Home Page
About iKnowIt.com
iKnowIt.com Free Trial
Login to iKnowIt.com
1st Grade IKI SEO Img Placeholder 980x640 Game GameFirst Grade IKI SEO Img Placeholder 980x640 Game Game

Building Subtraction Skills with Missing Numbers

Understanding how to solve subtraction equations with missing numbers is a key milestone for first grade students. This concept lays the groundwork for algebraic thinking by encouraging children to use logic and number sense to figure out the missing part in a number sentence. Whether it's figuring out how many apples are left after some are taken away, or how much change is needed at a store, the ability to identify missing values in subtraction problems is an important everyday skill. This interactive lesson provides engaging online learning opportunities through fun, game-like practice tailored specifically for young learners.

1st Grade IKI SEO Img Placeholder 980x640 Game LessonFirst Grade IKI SEO Img Placeholder 980x640 Game Lesson

Interactive Learning That Supports Mastery

This first grade math activity uses an educational game format to help students practice solving subtraction problems within 20, where one of the numbers is missing. Through immediate feedback and colorful visuals, students can self-correct and build confidence while they complete each question. Designed for classroom and at-home use, the lesson fits perfectly into elementary teaching routines. Teachers can assign it as independent classwork or homework, while parents can use it for extra skill practice during evening study time. It's a great tool for reinforcing subtraction facts in a fun, low-pressure way.

Enhancing Math Instruction with Supplemental Practice

Teachers can boost students' understanding of missing number subtraction by combining this online learning activity with hands-on manipulatives, math fact flashcards, and group games. The lesson is especially effective when used alongside printable worksheets or interactive whiteboard review. As part of a growing library of interactive math and ELA resources, this first grade lesson offers targeted support for essential elementary skills. Whether used in the classroom or at home, this engaging subtraction activity helps young learners build fluency and problem-solving confidence in early math.

1st Grade IKI SEO Img Placeholder 980x640 Game ActivityFirst Grade IKI SEO Img Placeholder 980x640 Game Activity

Level

This interactive math lesson is categorized as Level A. It may be best suited for 1st grade students.

Common Core Standard

1.OA.8, MA.1.AR.2.3, 1.5E
Operations And Algebraic Thinking

Work With Addition And Subtraction Equations.
Determine the unknown whole number in an addition or subtraction equation relating three whole numbers. For example, determine the unknown number that makes the equation true in each of the equations 8 + ? = 11, 5 = ? - 3, 6 + 6 = ?.

You might also be interested in...

2-Digit Minus 1-Digit Numbers; No Regrouping (Level A)
Solve the subtraction problems. These basic problems do not require students to borrow or regroup. Includes graphical hints and explanations. 1st and 2nd grades

Missing Numbers to 10 (Subtraction) (Level A)
Try out this first grade level math lesson for missing numbers to 10 (subtraction) practice with your class today!



iKnowIt.com Home Page
About iKnowIt.com
iKnowIt.com Free Trial
Login to iKnowIt.com