Khan Academy: Arithmetic Properties: Commutative Property for Addition

Adding double-digit numbers can seem difficult for some students. But, this Khan Academy video makes this process clear in a developmentally sound way. Students watch as 'Sal' adds the number 46 to 43. He references each number by its...

This video explains the commutative law of addition. Practice problems are available. [1:40]

Commutative Law of Multiplication is presented with an example in this video.

This video shows several examples of addition with up to four-digit numbers. Practice problems are available. [8:57]

Clarify for young scholars the basic properties of addition and multiplication with this foldable math resource. Written on the front flaps are the terms commutative, associative, identity, and inverse...

This video covers addition by counting and using a number line, followed by place value concepts and addition of two-digit numbers. Practice problems are available. [12:26]

This video shows addition of numbers to millions, demonstrating regrouping of numbers and place value. Practice problems are available. [8:49]

Practice applying the distributive property to algebraic expressions. Students receive immediate feedback and have the opportunity to try questions repeatedly, watch a video or receive hints.

Sal uses the distributive property to break up 4x7 into smaller numbers.

Practice adding two-digit numbers by making tens on Khan Academy. If you are stuck, watch a refresher video or choose to get a hint. Test yourself to see how many you can get correct!