# Properties of Addition - Part 1 - Lesson for Grade 1, Chapter - Addition and Subtraction - less than 20

In "Properties of Addition - Part 1," students in Grade 1 will embark on an exciting journey into the foundational principles of addition, an essential component of the "Foundations in Operations Within 100" unit. Through engaging activities such as the Commutative Property of Addition Worksheet and the Boomerang Addition Worksheet, learners will unveil the flexibility of addition, understanding that the order in which numbers are added does not change the sum. This concept, known as the Commutative Property of Addition, highlights the idea that for any two numbers, a + b = b + a.

Further exploration will lead them to the Associative Property of Addition through the Train Addition: Associative Property Worksheet. This property teaches students that no matter how numbers are grouped in addition, the sum remains constant. In simpler terms, when adding three or more numbers, the way in which the numbers are grouped doesn't affect the final outcome (e. g. , (a + b) + c = a + (b + c)).

Understanding these properties is crucial as they not only build a solid foundation for more complex mathematical concepts but also enhance problem-solving skills, making addition more efficient and fun.

Estimated classroom time: 13 min
Chapter: Addition and Subtraction - less than 20
Unit: Foundations in Operations Within 100
Click on any activity below to start learning.
1st
3:00 min
Commutative Property of Addition Worksheet
worksheet
2nd
3:00 min
worksheet
3rd
4:00 min
Associative Property of Addition
video
4th
3:00 min
Train Addition: Associative Property Worksheet
worksheet
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• ### Activity 1 / Commutative Property of Addition Worksheet

The commutative property of addition means that switching around the addends will not change the sum. Help your little learner master this important math rule using this helpful worksheet from Kids Academy! Silly elves encourage learners along the way as kids work through each row, swapping the addends or finding the sum. Compare each number sentence after completing to observe that the sum remains the same no matter the order of the numbers being added!

• ### Activity 2 / Boomerang Addition Worksheet

Every kid knows that when a boomerang returns after it is thrown, reversing its path in the air. Likewise, the commutative property of addition means that one can reverse the order of a number equation, and the sum would still come out to be the same. Use this clever worksheet to match colorful boomerangs that contain number equations with the same sum. Look through each column and use the commutative property to find the matching pairs!

• ### Activity 4 / Train Addition: Associative Property Worksheet

The associative property of addition tells us that we can add a number equation no matter how the numbers are grouped. That means that means that we can add three numbers together, and it doesn’t matter which order the numbers are placed because the total will be the same regardless! Practice this crucial pre-algebra skill with your kids using this colorful train-themed worksheet that asks kids to think deeply about whether the equations are equal due to the associative property of addition!