Partial Product Finder

Last week, we started taking a more in depth look at multiplying by 2 digit numbers and what the distributive property looks like. We have been focusing on breaking our 2 digit numbers up by their place values and having a group for the tens place and a group for the ones place.

Jennie Kottmeier has some really good {and FREE} properties of multiplication posters that you can get {here}. This is what the distributive property looks like.

7 is broken up into 5 and 2. Then, 5 is multiplied by 4 and 2 is multiplied by 4. 5x4=20 and 2x4=8. 20 and 8 are the partial products that area added together to get 28.

Last night, as I was searching the web for math fact practices, I came across a web app through Math Learning Center. They have so many great {FREE} apps that can be used on the computer as a web app or on a tablet as a downloadable app!

Their newest app that they are still in the process of building is a {drum roll, please!} partial product app! You can change the factors in the problem and move the arrows at the side of the array to change the distribution of numbers in the problem.

It also tells you the new multiplication equation for each section of the array, what the partial products for each section are, and the total after all of the partial products are added together. This is EXACTLY on of the strategies we have been working on!

They have several other free math apps that can be used on the web or downloaded onto a tablet. Number Pieces and Number Line are some good apps for practicing different operations. Check out their other math apps {here}.

I hope you find this resource useful! :)