# Unknown Number Word Problems - Lesson for Grade 1, Chapter - Thinking Deeper about Addition and Subtraction—The Unknown Number

In the "Unknown Number Word Problems" lesson, designed for Grade 1 students, learners will embark on a journey to deepen their understanding of addition and subtraction through engaging and interactive activities. This lesson falls under the chapter "Thinking Deeper about Addition and Subtraction—The Unknown Number" within the unit on "Applications in Operations Within 100", providing students with invaluable skills for solving real-world problems.

Throughout this lesson, students will explore various methods to identify unknown numbers in equations and word problems. Activities such as the "Missing Addend Word Problems Worksheet" and the "Missing Number Word Problems Worksheet" will challenge students to think critically and apply their knowledge of addition and subtraction to find hidden numbers. The use of a "Number Lines" activity will further enhance their ability to visualize and solve problems, making the concept more tangible. Additionally, the "Counting in an Amusement Park Worksheet" will add an element of fun and real-life application to their learning experience, demonstrating the relevance of these skills beyond the classroom.

By mastering the skill of identifying unknown numbers, students will not only boost their mathematical proficiency but also develop critical thinking and problem-solving skills.

Estimated classroom time: 17 min
Unit: Applications in Operations Within 100
Click on any activity below to start learning.
1st
3:00 min
worksheet
2nd
4:00 min
Solving Problems with Number Lines
video
3rd
3:00 min
Counting in an Amusement Park Worksheet
worksheet
4th
3:00 min
Missing Number Word Problems Worksheet
worksheet
5th
4:00 min
Figure out Unknown Number in Equations and Word Problems
Quiz
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• ### Activity 1 / Missing Addend Word Problems Worksheet

Practicing as many addition and subtraction problems as possible is critically important for fluency and mastery but completing word problems help kids understand real-world math applications, while working their minds to solve problems presented to them through language. Here we have a delightful math worksheet that features cute and relatable scenarios and pictures. Read each problem and solve for the missing addend with the help helpful images to guide the way!

• ### Activity 3 / Counting in an Amusement Park Worksheet

Who doesn't love an amusement park? This colorful worksheet will give your child some delight as they work on solving basic addition problems with missing addends. The picture representations will give them tangible ways to solve the math equations, and they'll use the traceable lines to connect the correct pictures to the complete the drawings accurately. The only thing that's missing on this fun downloadable is the roller coaster ride!

• ### Activity 4 / Missing Number Word Problems Worksheet

Word problems are mathematical problems that come in the form of texts. When your child sees a word problem, they might be confused at first. The key to solving word problems is first reading and understanding them, and then translating the text into an equation. Read the word problems in this worksheet to your students. Help them translate the sentences into a mathematical equation, and then check the equations that match the word problems. Then, circle the correct solutions.

• ### Activity 5 / Figure out Unknown Number in Equations and Word Problems - Quiz

This quiz assesses students’ ability to solve to find an unknown number in an equation.