In this lesson titled "Relate Subtraction and Addition," first-grade students will delve into foundational concepts within the realm of operations involving numbers 20 to 100. The activities are creatively designed to ensure a comprehensive understanding of how addition and subtraction are interconnected through engaging themes like Fact Family Haunted Houses and Easter Math Worksheets. By exploring Fact Families, students will learn to identify and create groups of related addition and subtraction facts, enhancing their ability to switch between the two operations seamlessly.

Through the "Addition or Subtraction?" and "Underwater Math" worksheets, students will practice determining the appropriate operation to solve problems, strengthening their problem-solving skills. Additionally, the activity "Add 10 to 2 Digit Number" will deepen their understanding of place value and its significance in performing calculations more efficiently.

Understanding the relationship between addition and subtraction is crucial as it lays the groundwork for more complex mathematical concepts. It fosters a deeper number sense and enhances mental math skills, which are essential for everyday problem-solving. This lesson empowers students with the ability to approach mathematics with confidence and a solid foundation, setting the stage for lifelong learning and application in various contexts.

Estimated classroom time: 17 min
Unit: Foundations in Operations Within 100
Click on any activity below to start learning.
1st
4:00 min
Fact Familiy Haunted Houses
video
2nd
3:00 min
Fact Families: Easter Math Worksheet
worksheet
3rd
3:00 min
worksheet
4th
3:00 min
Addition and Subtraction: Underwater Math Worksheet
worksheet
5th
4:00 min
Quiz
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• ### Activity 2 / Fact Families: Easter Math Worksheet

Your little bunnies will adore this fun and colorful PDF that brings Easter math to a whole new level. They'll look at the brightly colored eggs and match the facts that go with the baskets. They'll also gain familiarity with adding and subtracting multiples of five, which will help strengthen their automaticity, and they'll just think they're having a lot of fun with their rabbit friends!

• ### Activity 3 / Addition or Subtraction? Worksheet

Watch your little math whiz's number reasoning and number sense soar with these brightly colored flag equations! The free downloadable PDF will have them find the appropriate orders of operation to correctly decide whether they're looking at addition or subtraction facts, and you'll get to watch their mathematical strategies come to life as they do so. It's a great opportunity for a deeper understanding of how parts of an equation work together with different operations.

• ### Activity 4 / Addition and Subtraction: Underwater Math Worksheet

Let your little mathematicians take an undersea adventure as they work to complete the number sentences with the correct answers. This bright and fun worksheet will have them analyze the numbers and the orders of operation, and use if/then statements to help them solve problems in the same number families. They'll learn that addition and subtraction being the opposite of each other can help them solve more problems too!

• ### Activity 5 / Add 10 to 2 Digit Number and Relate Addition and Subtraction - Quiz

This quiz assesses students’ ability to solve equations by adding or subtracting 10.