Mr. Addit reviews the terms addend, sum, and plus. He then provides three methods for finding the missing addend in an addition sentence.

Good things come in threes, especially at the aquarium! Join Mia today as we learn to add three numbers together to find the total. Mostly, we've learned to add two numbers together, like 2+3, but today we are working with three charming...

Double the trouble, double the fun. Join us in this mighty video as we learn our doubles facts. Doubles are just an easy way to memorize addition and subtraction facts, such as 5+5 or 7+7.

In this lesson, students learn how to create arrays by modeling equal add-ins. The video explains the concept of addends, sums, and the importance of having equal addends to make an array. It provides examples using candies and circles...

This video explains the concept of rows and columns in an array and provides a helpful analogy to remember their directions. Students practice writing addition sentences based on the number of objects in each row and column, ultimately...

This nugget demonstrates the fact that if the order of the numbers are changed in an addition, the answer does not change.

In this video, the teacher explains how to build greater numbers by decomposing them. Decomposing involves breaking down numbers into their individual parts, such as tens and ones. The teacher provides examples and walks through the...

In this lesson, students will learn how to subtract large numbers by using addition. By understanding the relationship between addition and subtraction, students can reframe subtraction problems as addition sentences and use strategies...

This video is a math lesson that teaches how to subtract within 20 by finding the difference between two given numbers. The video starts by reviewing the definition of subtraction and explaining how subtraction is related to addition...